@M-Andre-Z-Eckenrode I think I may have found the cause. Would you try installing this version: https://github.com/Coises/SearchPlusPlus/releases/tag/v0.6.3.2 and see if the problem goes away? If the problem is what I think it is, this will make it go away. It isn’t a good solution (it will cause serious inefficiency for large files), but if you no longer see the problem with this version, I’ll know I’ve almost certainly identified the cause, and I can work on a proper resolution. Thank you so much for all your effort.

@Passant-Delarue , Initial guess: turn off “. matches newline”, otherwise your .* will greedily match the whole file.