Android 12 Oxygen 12 updated for OnePlus 9 Pro has MAJOR BUGS & ISSUES!!!!!!

I started experiencing all the issues stated above on my OnePlus Pro 9 starting a month ago following my update including:

Screen goes black when watching videos on full screen (particularly YouTube)

Fingerprint stops working

Brightness defaults to max

Phone runs slow and very hot

Cannot use apps in split screen mode

TMobile replaced my phone when I notified them of the issues. New phone worked fine for a week until another OTA update broke everything again.

Like others stated the new security patch stabilizes most things with the exception of:

YouTube

Split screen mode still doesn't work in most apps

Will look to return the phone/exchange for something else.

no one in here to either acknowledge nor respond to something like this...the site is primarily peer to peer assistance only with a handful of admins and moderators to keep the site in order only...

Some update ran a couple weeks ago on  my OnePlus Nord, now the alarm clock works one time out of 10, I can no longer find a way to do a USB file transfer from my PC to the phone ("usb preferences" no longer exists). Congratulations, this update really HOSED us. Congratulations to the QA that let this trainwreck of a so-called update get out to customers. LAME. FIX IT!!!!!

I switched mine back to OnePlus 7T. Slightly smaller but now that it's unlocked bootloader wise, I can do whatever I want with it. Plus I always hated this stupid curved glass that does nothing once you put a screen protector.

T-Mo really dropped a ball on this one. I miss the good 'ol days when Sprint SERO was $30/month and upgrade was super cheap 😅

Oh I left the cover off so the curved glass could make scrolling attempts just zoom out instead, or go-back in the browser to previous tabs, or just do some random operation because 3 things are being touched. 😂

Some phone gears make so we could use the side for just one gimmick. But yeh, imagine scrolling without covering content costing 600 more, right? I seriously do not feel like this is an 800 dollar phone at all. It's not even as nice as my Sony Z1, Z3-5 all those phones felt better than this until tmo broke all their connectivity to sell sam-songs over priced stuff.

With laptop specs I expect apps to just run smoother and instantly. This isn't it. The 300 dollar LG I have runs smoother on wifi... It's a wreck innit?

Got my OP 9 Pro 3 weeks ago and warrantied after 1 week for a new one because the brightness would go max brightness and the screen would flicker. The phone becomes inoperable until you restart it and this is a brand new phone from a T Mobile store just a few days after use. So like I said I warrantied it, got a new one - SAME PROBLEMS. The screen will go max brightness on its own, flicker, the fingerprint reader goes all white and will not read fingerprints. This is disturbing as this new warrantied phone is just a couple days old out of the box with the same issues. I'll be going back to Samsung if this doesn't get fixed soon. I do business on my phone and I pay good money and been with T-Mobile for over a decade. This needs to be addressed ASAP, it's unacceptable to take Flagship smartphone money and not fix a major issue if there is one. I will climb the latter to see this doesn't cost me money, I do my part and pay my bill and pay for my phone - T mobile needs to do their part on this system update and make things right with this line of OnePlus. I will be coming back to this post daily to add my thoughts and provoke action.

pretty much all the manufacturers ran into issue with 12

Hey guys, I came here looking for some answers too. I have a OP 9 Pro and am having all the issues stated here. Frame rates drop to seizure-inducing levels, brightness is unchangeable (normally stuck at max), fingerprint reader randomly becomes inoperative (turns into a white bubble), etc. 

As glad as I am to hear it's not just me, the lack of support is astounding. If anyone does find some sort of fix I would appreciate they post it here. I had a OnePlus 6T and loved it to death. I was so excited for the 9 Pro, but it has been questionable the last few months to say the least. 

since the site here is primarily peer to peer assistance..what support are you looking for? they dont pop into here to update stuff like this..as of right now OP is needing to fix their compatibility issue that came in with 12...TMO isnt the one that would be fixing this..

I literally just googled the issues of my phone and this popped up! So do we need to contact OP? because if this is only for t-mobile there is no point in all of us complaining here.