Peplink AP One AC Mini uptime and online time vary

Hello, I have 5 AP one AC Mini access points all controlled with Incontrol2. These are all connected to a BRI pro. The access point seem to be falling of line and then returning randomly. Each one has a different uptime and online time showing in Incontrol but they were all reset at the same time. Some times an AP will fall offline completely and will require a power reset. 4 of the 5 access points are powered with POE. The new AP in powered from an external supply. Can any one explain why this is happening?