We have an iPad, Amazon Fire with Fire OS 7.3.1.7 and a PS 4 all running the 1.16.200 Bedrock and we are trying to host Original Bed Wars, which size wise is a tiny world, on the iPad. 

It will occasionally allow three of us to connect on each of the above devices and play together. More often than not we get 'Cannot connect to World' and it refuses to let us play. We are all on the same LAN.

We used to regularly play together in different worlds without issue, but since 1.16 was released we regularly get this problem and it's a complete lottery whether it will work. All it takes is one device not to connect and it's game over.

I've checked all Microsoft accounts and we have appropriate settings, plus I've deleted and re-added all friend accounts (multiple times) on Xbox Live as suggested in some online articles and it has made no difference.

Why is it no longer working in 1.16?