Like your comment about diplomat, and good catcher working through it.There is a lot of trust between a catcher and the umpire. There are certainly limits, but in my opinion, the catcher needs to absolutely be the 'diplomat'. That relationship is 'A1 critical' even if it is sketchy sometimes. Good catchers know how or need to learn how to work thru it.
Now the specific example shown about the back foot, hmm, I'd tell the coach before I'd tell the pitcher. Let them work out the details with the ump.