I have. Not only have I changed the power supply, I've changed the power delivery method (POE to direct connection). Same problem. Ended up returning it, don't have time for unfit-for-purpose rubbish in my life.
I'm struggling with this immensely.
1. It was previously working. It just stopped working for no reason (on cellular only - wifi is fine).
2. I have a work phone and a personal phone - all is working fine on my work phone.
So the configuration is obviously correct or else it wouldn't be...