diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 51c3c64e59..54b046b7d2 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -1,4 +1,4 @@
-*options.txt*	For Vim version 9.1.  Last change: 2025 Sep 08
+*options.txt*	For Vim version 9.1.  Last change: 2025 Sep 10
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -2303,13 +2303,13 @@ A jump table for the options with a short description can be found at |Q_op|.
 	   preinsert
 		    When autocompletion is not enabled, inserts the part of the
 		    first candidate word beyond the current completion leader,
-		    highlighted with |hl-ComplMatchIns|.  The cursor does not
+		    highlighted with |hl-PreInsert|.  The cursor does not
 		    move.  Requires 'fuzzy' unset and 'menuone' in 'completeopt'.
 
 		    When 'autocomplete' is enabled, inserts the longest common
-		    prefix of matches (from all shown items or buffer-specific
-		    matches), highlighted with |hl-PreInsert|.  This occurs only
-		    when no menu item is selected.  Press CTRL-Y to accept.
+		    prefix of matches (from all shown items or from the
+		    current buffer items).  This occurs only when no menu item
+		    is selected.  Press CTRL-Y to accept.
 
 	   preview  Show extra information about the currently selected
 		    completion in the preview window.  Only works in
@@ -4725,7 +4725,7 @@ A jump table for the options with a short description can be found at |Q_op|.
 	|hl-PmenuThumb|	 X  popup menu scrollbar thumb
 	|hl-PmenuMatch|	 k  popup menu matched text
 	|hl-PmenuMatchSel| <  popup menu matched text in selected line
-	|hl-PreInsert|	 I  text inserted when "preinsert" and 'autocomplete'
+	|hl-PreInsert|	 I  text inserted when "preinsert" is in 'completeopt'
 
 	The display modes are:
 		r	reverse		(termcap entry "mr" and "me")
diff --git a/runtime/doc/syntax.txt b/runtime/doc/syntax.txt
index 949bf1759f..39a64da63d 100644
--- a/runtime/doc/syntax.txt
+++ b/runtime/doc/syntax.txt
@@ -1,4 +1,4 @@
-*syntax.txt*	For Vim version 9.1.  Last change: 2025 Sep 08
+*syntax.txt*	For Vim version 9.1.  Last change: 2025 Sep 10
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -5999,7 +5999,7 @@ PmenuMatchSel	Popup menu: Matched text in selected item. Applied in
 							*hl-ComplMatchIns*
 ComplMatchIns	Matched text of the currently inserted completion.
 							*hl-PreInsert*
-PreInsert	Text inserted during autocompletion when "preinsert".
+PreInsert	Text inserted when "preinsert" is in 'completeopt'.
 							*hl-PopupSelected*
 PopupSelected	Popup window created with |popup_menu()|.  Linked to
 		|hl-PmenuSel| by default.
diff --git a/src/insexpand.c b/src/insexpand.c
index d797bc5d94..dac3698cf7 100644
--- a/src/insexpand.c
+++ b/src/insexpand.c
@@ -1067,10 +1067,13 @@ ins_compl_col_range_attr(linenr_T lnum, int col)
 {
     int	    start_col;
     int	    attr;
+    int	    has_preinsert = ins_compl_has_preinsert();
 
     if ((get_cot_flags() & COT_FUZZY)
-	    || (!compl_autocomplete
+	    || (!has_preinsert
 		&& (attr = syn_name2attr((char_u *)"ComplMatchIns")) == 0)
+	    || (!compl_autocomplete && has_preinsert
+		&& (attr = syn_name2attr((char_u *)"PreInsert")) == 0)
 	    || (compl_autocomplete
 		&& (!compl_autocomplete_preinsert
 		    || (attr = syn_name2attr((char_u *)"PreInsert")) == 0)))
@@ -2531,9 +2534,7 @@ ins_compl_new_leader(void)
 	if (compl_started && compl_autocomplete
 		&& !ins_compl_preinsert_effect())
 	{
-	    if (ins_compl_insert(TRUE, TRUE) != OK)
-		(void)ins_compl_insert(FALSE, FALSE);
-	    else
+	    if (ins_compl_insert(TRUE, TRUE) == OK)
 		compl_autocomplete_preinsert = TRUE;
 	}
 	else
diff --git a/src/testdir/dumps/Test_autocompletedelay_7.dump b/src/testdir/dumps/Test_autocompletedelay_7.dump
index 954b785d87..6c43fa46e9 100644
--- a/src/testdir/dumps/Test_autocompletedelay_7.dump
+++ b/src/testdir/dumps/Test_autocompletedelay_7.dump
@@ -1,7 +1,7 @@
 |f+0&#ffffff0|o@1| @71
 |f|o@1|b|a|r| @68
 |f|o@1|b|a|r|b|a|z| @65
-|f>o@1| @71
+|f>o+0#00e0003&@1| +0#0000000&@71
 |f+0#0000001#e0e0e08|o@1| @11| +0#4040ff13#ffffff0@59
 |f+0#0000001#ffd7ff255|o@1|b|a|r| @8| +0#4040ff13#ffffff0@59
 |f+0#0000001#ffd7ff255|o@1|b|a|r|b|a|z| @5| +0#4040ff13#ffffff0@59
diff --git a/src/version.c b/src/version.c
index 10958a5091..c741108d90 100644
--- a/src/version.c
+++ b/src/version.c
@@ -724,6 +724,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1750,
 /**/
     1749,
 /**/