As I started to "really" use Mp3tag on Mac I found a problem with a regexp I used thousands of time on Windows. I stripped it down and kept just the regexp:
This should return the "divisor" of the disc number (i.e. 3 if disc number is 1/3) but it returns the whole tag (1/3) instead. I already wrote to Florian but he told me that regexp worked for him, so I was wondering if it could be somehow related to OS language settings.
I'm using latest Big Sur Public Beta, OS language and cultural convention is ITALIAN.