Sure it happens all the time on various channels. Sometimes just changing channels momentarily will help and other times they are just bad at the time.
That's the problem. You have to delete the current MAC and put in the one you are going to change to, then do it all over when you want to change back. Not worth the time to me.
I am one that has noticed that there is more lag in channel changing now but I also wonder why 6 to 8 seconds can be such a big deal to anyone. Something has changed and that's the way it is. Live with it. Gain some patience you pirate.