So I found solution by myself.

I turned off corrupted host, then on pool master I forgot corrupted host (xe host-forget uuid=aaaaaaaaa-bbbb-cccc-ddddddddddd).

Perform a clean install of corrupted host, setup everything as it was, then patch host with XOA.

As last step I connect it back to the pool, now everything is working fine again.

To be honest, I do not know what happened, but everything is working now.