R200 Gets Clicking Sound, General Sound Breakup, and Loses Caller ID Until Reboot

I have a customer who has had this problem twice in the past 2 days. His phone audio quality will be poor (he describes it as having a clicking sound and otherwise damaged audio), and caller ID stops working. A reboot fixes the problem. This is a new install with R4.3.3 installed.

Has anyone else had this problem with poor quality and loss of caller ID function?