You say this started about a month ago? Same happened to me after an OS update around that time. It resolved itself after a new update, is your software up to date?

I bought one 2 years ago, a magsafe one with the exact design and colors I wanted. €80 at the time and that was worth it to me, it saved my phone from many falls and just now after two years started wearing down. I wouldn’t have done it if it weren’t for the customization, and they seem to have increased their prices quite a bit… I wanted to get the same case again but I stuck to an otterbox.