The message seems related to an emulex fibre channel adapter.
* Do you use it?
* what does the other side of the FC connection look like - any logs there?
* try installing another kernel:
** upgrade to the latest available one
** try installing pve-kernel-5.3
** does the problem persist with the other kernels?
* make sure the firmware of your system (and especially the emulex card is up to date)
I hope this helps!