I have this same issue where MAC's on trunk ports will suddenly appear on the port that the HPE printer is connected to, and then I can't reach the GW SVI. The printer 802.1x is disabled. I use 802.1x on the switch authenticating with Aruba Clearpass...
I would imagine that it doesnt stay fast for very long. What may be happening is that it has to look through the table for the proper entry and as the table grows larger and the connections increase you slow down. This of course is dependent on how m...