Ok, I have a fairly persistent repro, and I can see that the webview process terminates itself. I looked at the iPad system logs (via the Console app on macOS when the iPad is set up for development), and nothing in particular stands out, this is happening at the OS level. Chances are that it’s unrelated to the recent app updates.
It’s going to be quite tricky to fix it, I’ll keep poking at it though. One test I’d like to make is to navigate meta or openAI for a while on regular Safari and see if that runs into any problems. Another possibility is that this is a memory management issue at the OS level. I’ll see if I can repro the issue by navigating the pages of a community more slowly.