Big-IQ stats last collection date stuck at unix epoch?

I've had similar issues,

Couple things to try,

My first suggestion would be raise memory on DCD to 32 GIG. seems high but seemed to help.

Make sure AVR is provisioned on big-iq,

F5 says this is required, but I have had devices work without it, so not sure about this. But might try it.

Also, once you've done that - remove and rediscover the devices.