Antennas did not reconnect on Omnitik, what is the reason?

Question

Mikrotik

There is a network of antennas with one omnidirectional and six directional.
Center: Omnitik 5 PoE; in different directions: Mikrotik RB SXT 5HPnD, Mikrotik SXTsq Lite5 4 pcs. and Ubiquiti PowerBeam M5 400.

settings

Maximum by default, well, WPA2-PSK.

signals

Previously, when there was no PowerBeam, the antennas worked on nv2, and there were no special problems. Now, after setting it to 802.11, one problem arose. More than a day after the launch at such settings, everything worked fine, but at one moment the antennas disappeared and did not return, as usual, and stood like that all night. With a simple Disable / Enable on the interface in Omnitik, the antenna connection was restored.

little things

• Журнал весь в memory, а потому пропал из-за моих необдуманных действий.
• Ставил watchdog-таймер на самую стабильную антенну, но тогда неоправданно часто перезагружается.
• Рядом со зданием под Omnitik-ом трансформаторы 6кВ.
• На этой же территории параллельно работают мосты для видеонаблюдения от Росгвардии.
• Получить дополнительные скриншоты настроек оперативно не могу, далеко.
• список из winbox-а

What could it be?