> This is planning issue, if you correctly size tickets you aren’t going to end up in messy situations as often.

I think the underlying issue is what is an appropriate “unit of work”. Parent commenter may want to ship a complete/entire feature in one MR. Ticketing obsessed people will have some other metric. Merge process may be broken in this aspect. I would rather explain to reviewer to bring them up to speed on the changes to make their cognitive load easier