Spanning Tree always noticed on event log

[AYEN]

Hi,

   I have noticed that spanning tree always see in event log in some of my switchport eventhough the connected device is Meraki MR. Is this normal? or I have to check on my config.

[ww]

It is a event of the port going down and up. I assume this is not good when there is a AP connected to that port.  

This should only happen at firmware upgrades or port/power schedules.

Check if the cable is good.

and the switch has enough poe power (in case you have many PoE devices)

[cmr]

It looks like bad cabling to me, is it a CAT6a run all the way from the switch to the AP?  Anything less and you'd be better to limit the AP to auto negotiate only up to 1Gb/s.