diff --git a/inventory-web/src/views/stock/inbound/product.vue b/inventory-web/src/views/stock/inbound/product.vue
index fa6e193..8fe88df 100644
--- a/inventory-web/src/views/stock/inbound/product.vue
+++ b/inventory-web/src/views/stock/inbound/product.vue
@@ -287,7 +287,7 @@
                         v-model="form.base_id"
                         filterable
                         remote
-                        reserve-keyword
+                        reserve-keyword="true"
                         clearable
                         placeholder="请输入名称或规格进行检索..."
                         :remote-method="handleSearchMaterial"
@@ -295,7 +295,7 @@
                         :loading="searchLoading"
                         style="width: 100%"
                         @change="onMaterialSelected"
-                        default-first-option
+                        default-first-option="true"
                         v-loadmore="loadMoreMaterials"
                         popper-class="product-dropdown"
                     >
@@ -460,12 +460,14 @@
                         v-model="form.bom_code"
                         filterable
                         remote
+                        reserve-keyword="true"
                         clearable
                         :disabled="!form.spec_model"
                         :placeholder="!form.spec_model ? '请先在上方选择入库物料' : '搜规格/编号'"
                         :remote-method="handleSearchBom"
                         :loading="bomSearchLoading"
                         @change="handleBomSelect"
+                        default-first-option="true"
                         style="width: 100%"
                     >
                       <el-option
@@ -956,9 +958,15 @@ const form = reactive({
 // BOM Search Logic
 // ------------------------------------
 const handleSearchBom = async (query: string) => {
+  // 防御性处理：粘贴场景常混入零宽字符 / 控制字符 / 不可见 Unicode
+  // 1) 强制转字符串，防 ClipboardEvent 对象
+  // 2) 深度净化：剔除所有控制字符、零宽字符、BOM
+  // 3) 常规 trim
+  const rawQuery = String(query || '')
+  const safeQuery = rawQuery.replace(/[\x00-\x1F\x7F-\x9F\u200B-\u200D\uFEFF]/g, '').trim()
   bomSearchLoading.value = true
   try {
-    const res: any = await searchBom(query, form.spec_model)
+    const res: any = await searchBom(safeQuery, form.spec_model)
     bomOptions.value = res.data || []
   } finally { bomSearchLoading.value = false }
 }
@@ -1057,7 +1065,17 @@ const rules = {
 // ------------------------------------
 // Material Search & Population Logic (已修改)
 // ------------------------------------
-const handleMaterialDropdownVisible = (visible: boolean) => { if (visible && materialOptions.value.length === 0) handleSearchMaterialDebounced('') }
+const handleMaterialDropdownVisible = (visible: boolean) => {
+  if (!visible) return
+  // 防御性拦截：竞态条件守卫
+  // 如果当前已经有搜索关键字（例如用户刚刚粘贴了内容、remote-method 已经设置了 searchKeyword），
+  // 绝对不要去请求默认列表，否则会清空 searchKeyword、覆盖正确结果。
+  // 只有当没有搜索关键字、且下拉列表为空时，才加载默认数据。
+  if (searchKeyword.value || materialOptions.value.length > 0) return
+  // 打断正在排队的 debounce 定时器，避免与默认请求相互打架
+  if (searchTimer) { clearTimeout(searchTimer); searchTimer = null }
+  handleSearchMaterial('')
+}
 
 const handleSearchMaterialDebounced = (query: string) => {
   if (searchTimer) clearTimeout(searchTimer)
@@ -1067,13 +1085,19 @@ const handleSearchMaterialDebounced = (query: string) => {
 }
 
 const handleSearchMaterial = async (query: string) => {
+  // 防御性处理：粘贴场景常混入零宽字符 / 控制字符 / 不可见 Unicode
+  // 1) 强制转字符串，防 ClipboardEvent 对象
+  // 2) 深度净化：剔除所有控制字符、零宽字符、BOM
+  // 3) 常规 trim
+  const rawQuery = String(query || '')
+  const safeQuery = rawQuery.replace(/[\x00-\x1F\x7F-\x9F\u200B-\u200D\uFEFF]/g, '').trim()
   searchLoading.value = true
-  searchKeyword.value = query
+  searchKeyword.value = safeQuery
   searchPage.value = 1
   materialOptions.value = []
 
   try {
-    const res: any = await searchMaterialBase(query, 1)
+    const res: any = await searchMaterialBase(safeQuery, 1)
     const apiResults = (res.data?.items || []).map((i: any) => ({ ...i, isHistory: false }))
     materialOptions.value = apiResults
     hasNextPage.value = res.data?.has_next ?? false
diff --git a/inventory-web/src/views/stock/inbound/semi.vue b/inventory-web/src/views/stock/inbound/semi.vue
index 51a6942..91754c5 100644
--- a/inventory-web/src/views/stock/inbound/semi.vue
+++ b/inventory-web/src/views/stock/inbound/semi.vue
@@ -322,7 +322,7 @@
                         v-model="form.base_id"
                         filterable
                         remote
-                        reserve-keyword
+                        reserve-keyword="true"
                         clearable
                         placeholder="请输入名称或规格进行检索..."
                         :remote-method="handleSearchMaterial"
@@ -330,7 +330,7 @@
                         :loading="searchLoading"
                         style="width: 100%"
                         @change="onMaterialSelected"
-                        default-first-option
+                        default-first-option="true"
                         v-loadmore="loadMoreMaterials"
                         popper-class="long-dropdown"
                     >
@@ -525,12 +525,14 @@
                         v-model="form.bom_code"
                         filterable
                         remote
+                        reserve-keyword="true"
                         clearable
                         :disabled="!form.spec_model"
                         :placeholder="!form.spec_model ? '请先在上方选择入库物料' : '搜规格/编号'"
                         :remote-method="handleSearchBom"
                         :loading="bomSearchLoading"
                         @change="handleBomSelect"
+                        default-first-option="true"
                         style="width: 100%"
                     >
                       <el-option
@@ -1003,9 +1005,15 @@ watch(
 // BOM Search Logic
 // ------------------------------------
 const handleSearchBom = async (query: string) => {
+  // 防御性处理：粘贴场景常混入零宽字符 / 控制字符 / 不可见 Unicode
+  // 1) 强制转字符串，防 ClipboardEvent 对象
+  // 2) 深度净化：剔除所有控制字符、零宽字符、BOM
+  // 3) 常规 trim
+  const rawQuery = String(query || '')
+  const safeQuery = rawQuery.replace(/[\x00-\x1F\x7F-\x9F\u200B-\u200D\uFEFF]/g, '').trim()
   bomSearchLoading.value = true
   try {
-    const res: any = await searchBom(query, form.spec_model)
+    const res: any = await searchBom(safeQuery, form.spec_model)
     bomOptions.value = res.data || []
   } finally { bomSearchLoading.value = false }
 }
@@ -1051,7 +1059,17 @@ const handleManagerSelect = (item: any) => {
 // ------------------------------------
 // Material Search (Matches Buy.vue)
 // ------------------------------------
-const handleMaterialDropdownVisible = (visible: boolean) => { if (visible && materialOptions.value.length === 0) handleSearchMaterialDebounced('') }
+const handleMaterialDropdownVisible = (visible: boolean) => {
+  if (!visible) return
+  // 防御性拦截：竞态条件守卫
+  // 如果当前已经有搜索关键字（例如用户刚刚粘贴了内容、remote-method 已经设置了 searchKeyword），
+  // 绝对不要去请求默认列表，否则会清空 searchKeyword、覆盖正确结果。
+  // 只有当没有搜索关键字、且下拉列表为空时，才加载默认数据。
+  if (searchKeyword.value || materialOptions.value.length > 0) return
+  // 打断正在排队的 debounce 定时器，避免与默认请求相互打架
+  if (searchTimer) { clearTimeout(searchTimer); searchTimer = null }
+  handleSearchMaterial('')
+}
 
 const handleSearchMaterialDebounced = (query: string) => {
   if (searchTimer) clearTimeout(searchTimer)
@@ -1061,13 +1079,19 @@ const handleSearchMaterialDebounced = (query: string) => {
 }
 
 const handleSearchMaterial = async (query: string) => {
+  // 防御性处理：粘贴场景常混入零宽字符 / 控制字符 / 不可见 Unicode
+  // 1) 强制转字符串，防 ClipboardEvent 对象
+  // 2) 深度净化：剔除所有控制字符、零宽字符、BOM
+  // 3) 常规 trim
+  const rawQuery = String(query || '')
+  const safeQuery = rawQuery.replace(/[\x00-\x1F\x7F-\x9F\u200B-\u200D\uFEFF]/g, '').trim()
   searchLoading.value = true
-  searchKeyword.value = query
+  searchKeyword.value = safeQuery
   searchPage.value = 1
   materialOptions.value = []
 
   try {
-    const res: any = await searchMaterialBase(query, 1)
+    const res: any = await searchMaterialBase(safeQuery, 1)
     const apiResults = (res.data?.items || []).map((i: any) => ({...i, isHistory: false}))
     materialOptions.value = apiResults
     hasNextPage.value = res.data?.has_next ?? false