Is anyone else having bluetooth issues with their Era 300? I don't think this is related to any of the ongoing app issues

I have an iPhone 15 and when connected to the Era 300 via BT, it drops out every now and then

It doesn't matter which app I'm using, so I don't think it's an app issue - it happens with Apple Music, Castro podcast app, Pocket Casts podcast app, etc

I've completely reset the speaker (drastic step but I figure I would do that when all the app issues first started anyway), I've forgotten the device via my BT settings and then re-paired it, I've reset network settings on the iPhone, I've of course reboot the Era 300 (by unplugging it for awhile) on multiple occasions but still having the problem

In contrast, I have one of those Bose Soundlink Mini II speakers and it has always been rock solid with the same iPhone and using the same apps

Thanks