i don't know, but i think don't save the ratings range. Maybe you must write and write these.
Restricting ratings range setting does not save?

I don't think that it works.
I usually start bughouse games from chess.com/live page. I type it, then I choose game type "bughouse", then I set the range.
Also you may try bookmark the https://www.chess.com/live#time=3m0s0i&game=bughouse&rated=rated&minrating=1200&maxrating=1400&color=&member=
url, and it starts a bughouse game with rating range restrictions
I'd like to play with people close to me in ratings, and saw that I can set a ratings range under settings -> play. However, it seems that this is not saved to my account? When I leave chess.com and return using the same account/browser later on, the ratings restriction disappears. In particular, whenever I first visit the variants bughouse page, the game that queues up automatically never has a rating restriction.