The mobile version is terrible, I'm sorry but there's no nicer way to say it.
The mobile version is terribly slow and sometimes doesn't even work at all and you have to refresh if multiple times to get it working. It insists on refreshing anytime you do anything which would be fine if it didn't literally break the game. If I want to refresh it, I will refresh it. If I leave the app for 5 seconds and I don't want to spend 20 seconds making it work again.
The desktop version is better but has many issues as well.
I've only ever used the mobile version and I don't have any issues.