Wifi required?

So I noticed that after the update I tried joining a server I play a lot on called Hive but it told me I needed wifi to olay with friends. I didnt understand because I use to be able to play using my mobile data and it worked just fine. I thought it was in my settings but I made sure it had mobile data turned on but it kept saying I needed wifi. Is this new and will stay like this or will this be fixed. Also im thinking of getting Minecraft for my switch but i heard you need a nintendo online subscription to play online. Does this mean I cant just use wifi to play on servers?