Better than before, but your lumbar is still unstable.
To fix this, the answer does not involve stopping squatting, but going more slowly and concentrating on locking your core solid. Do some hip pops to make sure you are keeping your core stable under no stress at all, and build from there (hip pop -> bar only -> slowly add more weight). All things permitting, this should probably take around half an hour.
By the look of things, you also need to get your posterior chain stretched to stop your pelvis dumping out.
Finally, don't push depth just because you want to: if your lumbar isn't stable, squat to where is starts to tuck and stop there... It is better to push from a solid foundation.
To fix this, the answer does not involve stopping squatting, but going more slowly and concentrating on locking your core solid. Do some hip pops to make sure you are keeping your core stable under no stress at all, and build from there (hip pop -> bar only -> slowly add more weight). All things permitting, this should probably take around half an hour.
By the look of things, you also need to get your posterior chain stretched to stop your pelvis dumping out.
Finally, don't push depth just because you want to: if your lumbar isn't stable, squat to where is starts to tuck and stop there... It is better to push from a solid foundation.