iPhone XR crashes on certain apps

Hi

My iPhone XR began crashing on certain apps a few weeks back, at the time a soft reset would solve the problem. This began to get worse until eventually all I had was the apple logo screen and it wouldn’t even let me reset. At this point I had to plug in to iTunes and reset to factory settings, this again worked for a few days until the same thing. This time I went into dfu mode and did the same thing and once again fine for a few days and back to crashing, lagging and all that good stuff again!!!

Any other ideas anyone could help me with?

Thanks

[Re-Titled by Moderator]