I'm having... Not quite the same issue, but a similar issue to bugs that have been closed as duplicates of this one.
I'm getting stuck on "Locating Server" when joining a specific world. We're both on Switch, v1.16.1. Doesn't matter if it's LAN or internet. Other worlds work. There's nothing obviously weird about this particular world; we've hardly explored or built much of anything.
I can replicate this issue in 1.14.60 Bedrock for Switch. Point a dispenser at a grass block, load it with bonemeal, and activate. The game will crash.
I just had a more severe version of this happen. At least I think it's the same bug. I had a Librarian who I traded with to lock in his offers. I left and came back, and he was now offering a bookshelf. He still had experience points, so it wasn't a fresh job, but he'd rerolled his offers somehow.
Important addendum: I had the "Natural Texture Pack" turned on. It's the problem, not the game as a whole.
Here's a weird addendum: Sometimes these villagers will continue to function normally. They won't be "assigned" to their job site but they'll still use it. But sometimes they won't, and their inventories never refresh, making the villager effectively nonfunctional.
Still works in 19.2. Can confirm that you can join games this way.
Moreover, and more importantly, I tested this game bug on a minor's account, full version, with Multiplayer disallowed, and that also worked, bypassing parental controls!