I know exactly what you mean and am totally frustrated by it. It only seems to do this to a few of my contacts, but it is always the same ones.
I edit the contact, give them a picture that takes up half the screen. It stays there for some indiscriminate time and then reverts to a circle again.
I tried using one of the many HD full screen caller apps, but have not found one that either fixes the issue, or for those contacts who i don't have great images of (those I'm not too fussed about), look like crap.
Would love to know if you found some sort of solution.
Im using a Samsung S10 FYI
09-17-2019 12:47 AM