diff --git a/src/buffer/mod.rs b/src/buffer/mod.rs
index 499e2dd82ad7..4676fb945b93 100644
--- a/src/buffer/mod.rs
+++ b/src/buffer/mod.rs
@@ -1152,7 +1152,7 @@ impl TextBuffer {
 
     fn find_select_next(&mut self, search: &mut ActiveSearch, offset: usize, wrap: bool) {
         if search.buffer_generation != self.buffer.generation() {
-            unsafe { search.regex.set_text(&search.text, offset) };
+            unsafe { search.regex.set_text(&mut search.text, offset) };
             search.buffer_generation = self.buffer.generation();
             search.next_search_offset = offset;
         } else if search.next_search_offset != offset {
diff --git a/src/icu.rs b/src/icu.rs
index d8f36a7d084d..a82b653d8253 100644
--- a/src/icu.rs
+++ b/src/icu.rs
@@ -628,7 +628,12 @@ impl Regex {
     /// # Safety
     ///
     /// The caller must ensure that the given `Text` outlives the `Regex` instance.
-    pub unsafe fn set_text(&mut self, text: &Text, offset: usize) {
+    pub unsafe fn set_text(&mut self, text: &mut Text, offset: usize) {
+        // Get `utext_access_impl` to detect the `TextBuffer::generation` change,
+        // and refresh its contents. This ensures that ICU doesn't reuse
+        // stale `UText::chunk_contents`, as it has no way tell that it's stale.
+        utext_access(text.0, offset as i64, true);
+
         let f = assume_loaded();
         let mut status = icu_ffi::U_ZERO_ERROR;
         unsafe { (f.uregex_setUText)(self.0, text.0 as *const _ as *mut _, &mut status) };