Night actions question

Say there are two roleblockers in a game, a mafia roleblocker (Mrb) and a town roleblocker (Trb)
For the purpose of this there is also a Cop in the game.
If Trb targets Mrb, and Mrb targets Cop, what happens?
Whose block takes precedence?
Another scenario:
There is a Mrb, Trb, Town Jailkeeper
Mrb targets Cop
Jailkeeper targets Trb
Trb targets Mrb
Mafia Godfather tries to kill Trb.
If Jailkeep takes precedence, then Trb doesn't die but Cop is roleblocked.
If Trb takes precedence, Cop investigates and Trb dies.
If Mrb takes precedence, Cop does not investigate, and ...
I'm confused.
Or should more than one roleblocker just not be in a game
For the purpose of this there is also a Cop in the game.
If Trb targets Mrb, and Mrb targets Cop, what happens?
Whose block takes precedence?
Another scenario:
There is a Mrb, Trb, Town Jailkeeper
Mrb targets Cop
Jailkeeper targets Trb
Trb targets Mrb
Mafia Godfather tries to kill Trb.
If Jailkeep takes precedence, then Trb doesn't die but Cop is roleblocked.
If Trb takes precedence, Cop investigates and Trb dies.
If Mrb takes precedence, Cop does not investigate, and ...
I'm confused.
Or should more than one roleblocker just not be in a game
