Can anyone explain the below image event log output.

[Jobsp]

The above is an event log message from Meraki MS210-48 model switch, here port 26 & 33 mentioned here is data vlan 404 which are desktop pcs. They are having device mac id which starts with A8:B1 . why it is showing here  "mac address flapping" & the mac ids mentioned here "9c:e3" etc which starts with are of the meraki switch which is connected to the current switch (both the switches are stacked).Can anyone explain in detail about the output & why it is showing other stack member switch mac id here? 

[alemabrahao]

This can happen for a few reasons, but I just have one question. Do you have access points connected to these switches?

If so, one explanation is that this is caused every time the client roams from one AP to another and is expected behavior.

[alemabrahao]

MAC flapping generally occurs when a MAC address is seen on multiple ports in a short period of time. This can happen for a variety of reasons, such as network loops, misconfigurations, or devices moving between ports.

[Jobsp]

I will explain the scenario. 3 switches are stacked as below. 

POE 1

NPOE 1

NPOE 2

POE 1 is connected with wifi AP & IP Camera since it is POE powdered. But the PC mac (which starts with A8:B1) is connected in NPOE 1 switch & 9C:E3 starting mac shown is of the NPOE2 meraki switch mac.

The 1st uplink for the stacked switch is given to NPOE2 & 2nd uplink is connected to POE 1 but 2nd uplink is blocked here due to STP.Only 2 fiber uplinks are connected to this stacked switch.