Squat back rounding again... 280lbs

[jukh]

Hi,
Sorry for dark shirt, all grey ones were in laundry.

Squat 127.5kg 280lbs 09.02.2024 - YouTube - 281lbs 3rd set

This rounding started at around 265lbs mark, so 3-4 sessions ago.
I didn't pay attention to it at first, and didn't film my sets during this time (big mistake, I know).
So today was pretty much the first time I realized how bad is this rounding.

It happens mainly on last 2-3 reps of 2nd and 3rd sets.
I've had this issue previously, Rip said to wear a belt because I wasn't tight enough. Is it same thing? Link to thread

Also elbow tendinitis came back (I assume it's because I roll elbows under the bar). I will add chin-ups to deal with it.

Should I take weight off and build my way up while working on form? Or maybe add a light squat day with tempo-squats to work on tightness?

I'm 18M/6'2/210lbs, 3rd workout of 9th week. Gained 20lbs since started SS. Sleep uninterrupted 9-10hrs.
Squat - 280lbs 3x5
Deadlift - 320lbs 1x5
Press - 115lbs 3x5 (Failed new progression today because of elbows and fatigued quads),
Bench - 210lbs 3x5 (Failed last progression because of elbows),
PC - 135lbs 5x3.

[Mark Rippetoe]

Your elbows are dropping, and that is causing the problem. Lift them as you get to the bottom and you will stay tighter.

[jukh]

Hi, Rip.

Thank you for answering. So just keep pushing and fix elbows, got you.

What do you think about technique other than that? Knees/back angle?