Again, I seek your valuable wisdom…

'A' race is T-10 days and my front SRAM R2C aero shifter has become very stiff requiring considerable force to change gear. It feels like the shifter has been over-torqued (although they've never been adjusted). In addition, to change up to the big chain ring I’m required to pull the shifter leaver almost 90 degrees - it then does not return to centre.

This issue seemed to happen overnight, I did not notice a gradual increase in force required.
The local bike shop (SRAM dealership) cannot look until next Wednesday (4 days before race...)
So I am able to shift still but its less than ideal and I’m very concerned of a failure.

Has anyone encountered similar issues?

I’m contemplating buying a new pair of shifters and raising a warranty claim for the originals.

Thanks in advance,