In my PR :

Senior dev A : "You should change the format according to <link to coding standard>"
Me : "But it doesn't mention anywhere about that format. <senior dev who wrote the standard> also agrees with me. Other reviewers also already approved."
Senior dev A : **proceed to give me an example from a file that's not even in the PR scope**
Me : "I cannot find that file in my PR"
Senior dev A : **give me another example example from my PR**
Me : "Okay I missed that, I am gonna fix it, but other files are already using consistent format. I have already merged changes for 500 files using this format, and I still have 400 files to go.
Do you really want me to revert the changes from 500 files?" :/
Senior dev A : "I don't want to be your enemy, I just want to make our codebase better"
Me : **Mad because he took this personally.**
**I don't want to be your enemy either. I also care about the codebase. I just want to finish this ticket ASAP instead of implementing your cosmetic changes that's not even in the standard so that I can work on another ticket that will have more impact to the company**
Senior dev A : "Ok, I will approve it, just add some whitespaces"
Me : 🤦‍♀️

I sometimes think that some senior dev just want to flex when they're reviewing PR.
They just want to let people know they wield the power.