Regex replace goes into infinite loop

With text containing a left bracket ([) the following search and replace code makes the app continuously insert newlines

Case sensitive is on, and using regex
Pattern
\[
Replacement
\n\[

Version 4.5.9 (2600) - portable version

Use the current version please.
When you insert new line, start replace from the end instead of the begin. I know, it's workaround only.