I see that the firmware and the app are updated to the latest versions, so there shouldn’t be any issues from this side. Let’s also check the following:
The NTRIP credentials. Do you enter ntrip.data.gnss.ga.gov.au as the address, 443 as the port, and CLYT00AUS0 as the mount point?
The Internet connection stability. You can connect Reach to another Wi-Fi network or a mobile hotspot to ensure the issue is not on the network side.