So, the problem is this: Mikrotik cAP ac does not provide Wi-Fi connection after some time of operation.

After power on, everything works fine. Can work 2-3 hours, or maybe a couple of days. But in any case, after some time the access point stops accepting Wi-Fi connections.
Rebooting doesn't help.

If I turn off and turn on the power - everything works great again.

This is observed only on cAP ac access points. wAP ac and hAP lite in the same infrastructure work perfectly without complaints.

How can I solve this problem?

I have one AP in my work with similar problem. After some time don't see 5GHz said on clients.

Wysłane z mojego TA-1021 przy użyciu Tapatalka