Photon breathing cyan, flashing cyan after some time and then breathing cyan again

I have a Photon that is breathing cyan (as it should) but every once-and-a-while it starts flashing cyan for a second or so and then returns to breathing cyan again.
Is this normal behaviour?
From my application I cannot see any unuxpected behaviour, but I just want to make sure that everything is allright.

That means the device briefly lost the connection to the Particle cloud. For a Photon 1, the connection is tested every 10 seconds. It's not uncommon for it to happen occasionally.

Thanks!