Axis Camera Slowness

I've started seeing a handful of my Axis cameras stop providing video to my VMS software. When I log directly into the camera, I get a login screen where I'm able to enter my user name and password. Once I log in, the camera is extremely slow to respond if it responds at all. If the camera responds, it can take 20-30 minutes to get the Basic Setup screen. Clicking on any of the options in the Setup screen means another 20-30 minute wait for the camera to respond. I've tried rebooting the camera through the System Options/Maintenance page but it doesn't help. If I go power the camera off manually, the camera will sometimes come back normally but other times it doesn't. My Axis Camera Management client reports the camera as "HTTP failed (ping or UDP OK) or Not accessible". I've seen the behavior mostly on my P3354 and P3364 cameras models. They all have the latest firmware installed. Has anyone else seen this behavior?

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