Sony 2019/2020 TV owners BEWARE 6.6053 firmware update. Increases input lag

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Just writing to warn anyone else who owns a 2019/2020 Sony TV listed here in this

XBR-55X850G
XBR-65X850G
XBR-75X850G
XBR-85X850G
XBR-55X950G
XBR-65X950G
XBR-75X950G
XBR-85X950G
XBR-43X800H
XBR-49X800H
XBR-55X800H
XBR-55X81CH
XBR-65X800H
XBR-65X81CH
XBR-75X800H
XBR-75X81CH
XBR-85X800H
XBR-85X81CH
XBR-49X950H
XBR-85X950H
XBR-55X950H
XBR-65X950H
XBR-75X950H
XBR-75Z8H
XBR-85Z8H
XBR-85Z9G
XBR-98Z9G
XBR-55A8H
XBR-65A8H
XBR-55A9G
XBR-65A9G
XBR-77A9G
XBR-48A9S

I don't know if this will be applicable to all models but I own an 55A8H and I updated the firmware several weeks ago and didn't attempt to play any games until this morning and right away something seemed wrong. Input seemed way more delayed than it should. I was using a Genesis 2 Mini which has *some* lag but it shouldn't have this much lag with a TV that should only have 20ms of latency and we have played the same game on it on two other TVs recently with less than 30ms display lag and it was just fine.
Before I even said anything my older brother who doesn't know anything about this stuff says "uh is it just me or does it seem a bit delayed????".
So I busted out my Time Sleuth and low and behold the TV now has a consistent 200+ms of lag outside of game mode (Holy smokes) and in Game Mode it varies between 60-200+ms. Turning on MotionFlow increases the baseline to 70 or so.
I tried every input and every setting I could think of and the results are all the same.
(Bad pictures)
https://drive.google.com/file/d/1-1OsOw ... drive_link (No, that 200ms is not a mistake. It will sit at that value for a long time before switching to 60/70ms for a while and then switch back. Which is something i've never seen with my TS before. The measurements are always consistent except for the CCFL TVs i've tested)
https://drive.google.com/file/d/1-08dpS ... 9U_Dv/view

Please do not update your TV's firmware. Not only is the lag tripled at minimum , the apps constantly crash and occasionally freeze so bad you have to unplug the TV to get it to unfreeze.
Here I was thinking I was glad they finally updated the security patch with the upgrade to Android 10 but boy I wish I knew.
Unless they fix this, it pretty much makes it completely unusable for the majority of gaming.

[Konsolkongen]

Thanks for the warning. That is really bad. Are you sure that this affects every TV on the list?

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I don't know if it will affect them, but this specific firmware update applies to all of those models (Android TV 9 to 10 update) from Sony's website. So I can only assume they fucked some part of the stack up for every model.
But my TV is basically useless for gaming now. So that sucks and considering this was the first firmware update in 1-2 years I doubt they are going to fix it in a timely manner even if I contact them.
Honestly they should be forced to replace TV if they won't fix it. But we all know how this works.
Beyond frustrating.

[SGGG2]

Anyone considering Sony should also be aware that some of their TV’s aren’t fully compatible with Nvidia 3000 and 4000 GPU’s — the TV’s exhibit audio issues, video dropouts and even rebooting. I have a Sony KD-43X85K, and sometimes it’s impossible to play anything. Both Sony and Nvidia have been aware of the issue for a while now.

https://www.nvidia.com/en-us/geforce/fo ... %2Ffriends

[copy]

Thank you OP, I have a 65X950G and will definitely avoid updating. That's awful that it may have ruined yours.

[BONKERS]

Trying to contact Sony about this is just as frustrating as there is no option to just e-mail support. And their work hours are the same as mine and I do not have the time during the work day to try to attempt to. I am so busy that the only break I actually get is a 30 minute meal break.
Trying to make a thread in their community section hoping there's an admin or someone who can contact actual support is a bust as well.

Trying to search for ways to downgrade the firmware of an Android TV doesn't come up with much results either.