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in second paragraph.
I can confirm that with UE v188.8.131.52 on Windows XP and having enabled in configuration:
- Search - Advanced - Shift+double click highlights all words which match word under cursor
- Search - Advanced - Use persistent highlight all
- Editor Display - Cursor/Caret - Enable multi-caret editing
and executing the described steps, the persistent highlighting of the shift+double clicked word remains even after inserting a string on multiple locations in file.
I can't test same procedure at the moment with UE v23.00.0.43 as not yet available for Windows XP. I can check tomorrow on another machine with Windows 7 with UE v23.00.0.43 installed already if there is indeed a difference in persistent highlighting of double clicked word in this use case.