Bizarre - call recordings stops for one hour every day

Hi

All extensions are set to record all calls. That works fine. Except between roughly 10AM and 11AM every day, where outbound calls are not being recorded. The log shows that it is creating the file etc but there is no trace of the file, nor is there a link in the cdrs. Come just past 11, it all starts working again.

I am on Freepbx 2.10 and asterisk 10 in this case and will upgrade to see if that fixes it, but would love to actually find out what this could be?