Co-op Checkpoints

Can this be a thing? I only play MCC with my uncle. And each time we play something happens and we have to start the level over completely. I have done Truth and Reconciliation 3 times due to disconnects or one us having to leave. Normally I wouldn’t have a problem but the beginning of a level on legendary is morale killing. Can we just make it to where if I don’t mess with the checkpoint (i.e chaning difficulty or switching from solo/co-op) it stays? please 343?