Hello. I will try to make logs if the problem occurs again. Unfortunately, I could not do it now, since all the routers are located remotely, and workers in remote locations are not specialists. Most often, KN-1111 and KN-1311 are used.
P.S. I was inattentive, i found the timeout settings in the WISP mode (on demand mode), set it to 30 seconds, I will see if anything changes.