Strange Notice--Not doing any base64 decoding

I am getting hundreds of notices that say:

NOTICE[2253]: func_presence_state.c:269 custom_presence_callback: Not doing any base64 decoding

I haven’t been able to find any helpful information on what this means. Anybody have a clue?

We are using Asterisk 11.3, FreePBx, and Digium phones, latest firmware, latest DPMA. This is an AsteriskNow build.

Everything is working fine as far as I can tell. I suspect it’s a module we aren’t using that needs an additional component, configuration or needs to be uninstalled.

Thanks in advance!