Updated Minecraft Bedrock for Nintendo Switch this morning, August 10th, and now I can not join a world that I previously have played online before this update! And every time I manage to connect, it crashes theinecraft Application on the Switch and won't connect to Marketplace. 

Revision on August 14th:

I made a new world and that seems to work great, but my fiance and I have "old worlds" that we were in the middle of playing on and we can't now. Are they going to fix this?