Double barlines does not affect linked parts
Platform: Win10 64bit
Score created: Musescore3 I believe
Looking at measure 177 (mark P), there's a double barline, but it doesn't exists in the linked parts.
You can try changing barlines anywhere, and those won't affect the parts either.
Also, there's a weird double time signatures on Flute3 at mark W, unable to delete only one of them. Tried removing them and add them back in full score, didn't help.