--- xfns.c	2020-09-27 12:07:36.298841349 +0200
+++ src/xfns.c	2020-10-05 02:15:01.690628616 +0200
@@ -7081,7 +7081,11 @@
      buffer.  */
   count_1 = SPECPDL_INDEX ();
   old_buffer = current_buffer;
+  /*
   set_buffer_internal_1 (XBUFFER (w->contents));
+  specbind (Qinhibit_read_only, Qt);
+  specbind (Qinhibit_modification_hooks, Qt);
+  specbind (Qinhibit_point_motion_hooks, Qt);
   bset_truncate_lines (current_buffer, Qnil);
   specbind (Qinhibit_read_only, Qt);
   specbind (Qinhibit_modification_hooks, Qt);
@@ -7092,6 +7096,7 @@
   clear_glyph_matrix (w->current_matrix);
   SET_TEXT_POS (pos, BEGV, BEGV_BYTE);
   try_window (window, pos, TRY_WINDOW_IGNORE_FONTS_CHANGE);
+  */
   /* Calculate size of tooltip window.  */
   size = Fwindow_text_pixel_size (window, Qnil, Qnil, Qnil,
 				  make_fixnum (w->pixel_height), Qnil);