Thanks Quinn. I'll try to dig from there.

Yep, you're right, my bad for misleading backtraces. The crash log attached is the extract from the XCode Organizer and reflects the correct backtrace. The log that I have inserted into the post is the extract of the same crashlog, but symbolicated by the third party tool (Firebase in that case) and it seems indeed pretty misleading. I assume the original author of the thread had encountered something similar with their crashlogs. Any suggestions where to go from here, given the exception traces way back to the WebKit's WKSelectTableViewController at frame 14?

Hey Quinn, I've added the log and details for the similar issue. Would appreciate any help resolving that.