I have had these same problems with my 390 Boss.
- the toe adjuster (opposite the ratchet) releases and the toe strap comes loose. This happens mid-run and I am always afraid it will happen.
-the ratchet adjuster does not lock on when cranking the lever. This has happened to me three times, and each time it kinda just fixed itself.
-high back adjuster coming loose. This happens frequently, and especially when I wipeout a couple times on a run.
Did Rome do anything for you?
I contacted them, still no reply.