Ok, more information to (hopefully) help your dev team. I hope they know that I understand how difficult it is to track down some bugs, and I'm trusting that they are doing the best they can to find the trigger.
On the latest Android 11 security/feature update, which appears to alleviate some of the problem. Now crashes are only at the 4th (sometimes 3rd) match in a row, including replays. (If the 3rd doesn't crash, it is very "hitchy") If I clear all apps in memory, and close and clear out CnC after every second match, I can string together games without crashes. (current no-crash streak at 14, restarting after every 2) I was noticing other apps (Pokemon Go, On X) that are resource intensive had similar hitches (though without crashing) and those instances also lightened up after the update. Unsure if this is a memory management issue, but with other reports I've seen of performance issues in 11 on Pixels, I'm wondering if there is something broken on the Android side of things?
I don't want to have this written off as simply Google's fault, but all variables should be considered. No other app I use is crashing, even if it exhibits the hitching/janky performance at times. Hope all of that info helps.
Thanks again for continuing to track the issue down. Also, thanks to everyone on here lending more voices to this issue. Knowing it is not a one-off issue helps the devs to figure things out.
Rock on.