Regexp unconsistent results

[Bonjour123]

I'm trying to find a simple regex in the editor. It works for almost all the cases, but for the following, I can't make it work.
Here is the regexp, in an online tester

Here is the jsfiddle

Can't find the reason why it doesn't match, and how to make it match.

[nightwing]

Currently multiline search works only for literal text. What are you trying to do maybe there is another way to achieve that?

[Bonjour123]

Maybe yes, I don't need very extended regexp, just str1.*str2, and that all the result be selected.

-Would it be long to modify the search function for literal text, so that when a certain condition is set, it extracts str1, str2, search them and select all what is between ? In this case, in which js file the search function is ?
-The second solution is to getValue to a basic string, and make the multiline regex on this string, and return the offset of the first and last chars of the results. But then, how to select this ? Because as I know, selection works in terms of coordinates and not with offsets (don't really understand why this isn't supported though). I'm more for this solution, as it would make a multline regex possible for ace editors, which would be cool !

[Bonjour123]

Didn't wanted to close, bad button ^^

[github-actions]

This issue has not received any attention in 1 year. If you want to keep this issue open, please leave a comment below and auto-close will be canceled.