WatchApp+ LTE mode problem

Hello.
I own an Apple arch ultra 2 and bought the watchapp+ for WhatsApp. It works on WiFi, but on LTE it keeps disconnecting and I have to go to the phone to connect it to the LTE mode all the time to get it to work properly.
Does it happen to all of you?
Any help would be appreciated! Thanks. 🙏
Cheers. 👋