Unable to plan a toute through timmelsjoch pass

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I've been unable to plan a route through the timmelsjoch pass, while I know the pass is open and battery wise it should work as well. Instead of going through the pass (with additional way points to force it), it just circles around it and takes a much longer route.

Very rarely, it does go through the pass. Earlier today I planned a route (not my actual requirement, but just for the feedback) from Meran (IT) to Obergurgel (AT) and it took the pass, so I skipped the feedback. Now, a few hours later, I replanned that same trip and it circels around the pass.