I'm about 6+ months in with this board. Have made no changes (other than update to bios 2.01, which unfortunately doesn't seem to include any of the pre-saved profiles that the prior version included...). Otherwise, cpu / memory all compatible etc. Using o/c robot settings for cpu and xmp profile for ram. As of a week or so ago, the boot process started showing issues. First boot sequence started taking longer than usual (e.g., went from 15-30 seconds to 60 seconds, so markedly different). Now, post sequence seems to hang at post code 10, with CATERR light off and before the VCCIO_1_2 Status lights up. It hangs in that state for about 60 seconds, turns off and recycles to the same state (i.e., loops in this state). If i restart via CMOS Reset Button, i am sent back into the bios where i can reload the prior profile, save and restart, and get into the OS thereafter without issue....

Thanks for the quick response Sajin, it's a 5.1 OC (with core 1 and 2 @ 5.2) on a 10900k at defaults. And i'm not benchmarking or otherwise pushing the cpu. I've had the same OC since day 1 (plus core 1 and 2 @ 5.3 and some minor tweaks to voltages) that ran stable (i.e., not a single crash). So I didn't really focus on this minor OC as the possible issue... in any case, i haven't tried @ defaults, but what are 'optimized' defaults?

Pressing F7 in bios loads the 'saved profiles' list, all of which are empty except for the profile i saved...

It's F5... loading optimized defaults and resetting has me stuck at post code 00....
 

If this issue didn’t occur on an older bios I would revert to an older one.

Well since your post code goes to 00 at optimized defaults I would replace the board... https://forums.evga.com/m.m.aspx?m=3075918&p=1

Feel free to keep using you’re workaround. 00 on cold start shouldn’t be happening at default settings. Maybe you should call evga tech support to see what they suggest.

Did this ever get resolved?
I am having the same issue on the z690. 
00 from cold start.