My 3970 did the same thing, I found myself constantly pushing the round piece to flatten it out. On the flip side no one has come up with a more ingenious invention than FP Journe with the adjustable deployant, my wrist swells & shrinks all the time. To be able to tighten or loosen while on the wrist is awesome. If I make the strap more snug alot of this moving around on the wrist goes away but is NOT comfortable. I just found that the NEW deployant lies flatter.
I have a fairly large wrist and the 5070 strap is way to long for me which creates the tongue problem. Anyway the shorter strap will solve that issue.