Sticking Brakes

[DRM500RUBYZR-1]

Originally Posted by We Gone

Have you ever changed your front brake lines? I had an issue the same as you it was the inside of the front lines had gotten soft and were collapsing not letting the fluid go back to the master cylinder. As soon as I released the pressure by opening the bleeder on the caliper it released.

I agree.
That would be my first suspect!
Explains the locking of front only.
M/C usually would affect all 4 the same.
The "cooldown" that fixes things might be a slow bleed off of the pressure, which could also point back to the M/C or the relaxing of the faulty hoses.
I would suggest switching to braided stainless lines on all 4 wheels as a good starting point, after inspecting all 4 calipers and lines for leaks.
Keep us posted on progress!

Marty