CRIO taking progressively longer to boot

[Spaghetti]

We've started running into an issue recently where the reboot of the rio is taking progressively longer.

In the beginning, it would take 9-12s fairly reliably. Over the course of a few hours and many reboots/code updates, we noticed it was up to 20s, then 40s, then 90s, then over 120s.

We flashed the rio using the imager and it was right back to 9-12s, but has since been slowing down on subsequent boots again.

This is the booting time before any of our code gets a chance to run so it doesn't seem like it could be our on robot code.

Has anyone run into this before and/or has any theories on what could be doing it?

Thanks --