AP (mesh mode) disconnected from the controller

Good morning, dear ones.I have a query on a problem with an AP in MESH

My computer was working fine, but from one moment to the other it was disconnected from the controller.

What I did at that moment was to disconnect it from power to the AP in mesh mode, and connect it to the SW that is connected the controller, and that I appear connected in the controller but no longer in mesh mode.

Then I connected it again (only power) in mesh mode. And raised the service with connectivity to the controller ..

The problem is that I repeat the times that this happens to me.

Could they help me with a definitive solution for this team, or what else could be going on?

Thanks in advance