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Are you using the bracing sequence when bending over?
Have you looked at movement patterns or movements which are causing the ilium to rotate?
If there is compensation within movement patterns the cause will remain and it will keep happening.
Have you watched the lunge archetype days of the 14 day challenge?
Have you watched psoas episodes? There are a few.
Couple to start with:
Psoas Flossing and Biker Hips | Episode 301
Episode 26: Hips and Seppuku: Psoas and Hip Soft Tissue Mob
Episode 04: Silent P in Filet, Very Paleo
Regular movement in the lumbar spine may be limited.