Rear Diff Fluid Leak

Currently at wits end and hoping for some guidance.
2024 SR5 TRD. Had an issue with my rear diff valve blowing fluid. Took it in, they replaced it saying the valve was clogged. 2 weeks later, same issue.
Based on the great advice through the forum, I did the rear diff breather extension, running the hose behind the tail light.
Any ideas on why, I would still be leaking diff fluid from the hose, up behind the tail light?
I originally thought the pressure valve was defective so I removed....problem still persists.
It does only appear to happen when Im driving at highway speeds. Daily driving doesnt seem to cause any issues.

 

How much fluid is in the rear diff? Is the diff really hot to touch after driving?

 

Fluid level is just a tad below the fill plug. Honestly, Ive never thought to check the heat of the diff upon returning home. Ill have to check that.