Yeah, it's really not easy to make it work on a phone when such a complex inputs are needed. It kinda works, but isn't exactly easy to use.
Now I feel left out with my z flip
I don't know if this has anything to do with your issues, but I think Google (where the site is hosted) has had some minor performance issues which seems to be resolved now. Some elements took way to long to load in certain cases, so they can have timed out.
If the issue is still there for both of you I'll keep investigating!