I have been buying OnePlus phones since 2014-2015 and there's always been minor bugs but nothing major. However, as the phones get newer the bugs seems to get worse. I bought a new OnePlus 9 Pro and it's incredibly buggy to the point where even normal cell phone functions (i.e. phone calls, voicemail, messaging, and photos) all have some type of negative issue. The customer support team told me they'd send me some materials and instructions so I can mail the phone back and get it fixed or possibly get a new one free of charge... that was back in March and still waiting for the resolution.