Welcome to the Wefugees Community and sorry for the rather late reply.
Unfortunately, I can not share any experience or knowledge from my side, whether the German authorities may reject the asylum application and point to the "save third country" you were living in before.
I will link two of our wonderful experts here. Maybe they can share some more information on your question. Dear @Alla_fka or @mbeon-Christine, Did you come across similar cases before?
All the best,