MFI Specsavers Advanced keep disconnecting from phone(UK - IOS 16.1.1)

Hi,
I’ve noticed over the past couple of weeks or so that my hearing aids when powering up are not connecting to my iPhone 13 Pro when it isn’t by my side.

Similarly I am finding that one or both aids are dropping the connection to my phone randomly.

The app associated with my aids is Rexton App running v2.6.10.

Anyone else experiencing similar dropouts?

Thanks all.

Just to update in case anyone else encounters this issue: I have done a ‘Reset of the network settings’ on the phone and this appears to have resolved the issue ie 24 hours on from the reset.