The ones affected seem to be ones that are just pasted right into the body of the post and auto-parsed into links. That's how most of our users insert links. I'll have to play around a bit with manually adding the [ url ][ /url ] tags and see if those are truncated as well.
Thanks for pointing me in the right direction. Had no idea there were multiple files.
For now I've installed this mod:
https://vborg.vbsupport.ru/showthread.php?t=288954 which works so far, but the truncated links screw it up if you edit a post (links are truncated in the edit box, which destroy the title rewrite).
/edit
Solved. Did a search files/sub-folders via Notepad++ and got all 3 files at once and edited all 3. One of them did the trick. lol