I should have mentioned before: if the address is in the 0x08000000-0x08100000 that's firmware code. Your game will be running in the 0x60000000-0x61000000 range. There's a symbols.db sqlite database that has symbols for the public side of the api, which we use for the profiler. I don't think we have a tool for looking up addresses in there but if you're familiar with sqlite you could look around in there.. But you still wouldn't find these numbers because they're in the low-level driver code. This crash log says it's crashing in the eMMC (flash storage) driver, and that address isn't doing anything unusual. It's dereferencing $r3, but the value there is the device instance, should be fine. 
And the $cfsr value looks like random bits to me, doesn't look like it logged the crash correctly. (The Lua stuff is also uninitialized data, don't worry about those 
)
One last thing to try: If you send up the crash report I can try and find it in Memfault and see what information they've got. In Settings, go to the bottom of the first menu to System, then go to the bottom of that menu to "Send Crash Report". If you give me your serial number (DM if you don't want to share in public) I'll look it up and let you know what it says.