Extensive data loss, meaning

I would like to definetly know what this “error” is due to.
Here a screenshot to explain in detail:

Reading around the forum, some say it’s a configuration issue, others say it’s wireless interference problem.
What I know for sure, it’s not due to routerOS version as someone could say.

maybe spectrum saturation issue.
try turn on hw protection to rts/cts and play with ANI a bit or turn off auto-frequency and DFS temporally for troubleshoot.
sometimes is side-effects of attack attempts(see ARP errors in loglist?)

Where can I find ANI setting?
Could be CPE’s damaged by unstable power?
However I will try out.
With nv2 protocol those problems do not exist anymore?

ANI = adaptive-noise-immunity argument in wireless advanced view.