A few days ago we upgraded a section of our network to 8.2.2 from 7.3.6
We upgraded all APs and SMs on this segment.
A few days later we started getting some complaints from a few people (on this segment and on other segments) that they were having sluggish performance. I check the system, all was fine but I noted that the segment that we had upgraded to 8.2.2 was showing about 2% packet loss.
This packet loss was nowhere else on the network.
I downgraded this segment to 7.3.6 and ALL issues disappeared.
I cannot be 100% sure that 8.2.2 was causing this, but the facts certainly point into that direction.
If you mind, what band/freq are you using?