Thanks Guys!
Tuomo: I don't have a solution yet

These sleeves are made by a lot of bowyers and I have not heard about that specific problem. This was not my first one but there's always things to learn.
Right now its freezing cold and very dry here - however, wehen I made this takdown sleeve it was begin of december and relativly mild and intermediate climate here - so that is my hope, maybe I'm lucky

Sure you have this effect more extreme in Finland with massive diffferences between summer and winter.
However I have already been thinking of how to improve that system - especially for drawweights like that. Thinking about putting some carbon also onto the male side in the future.
If this one does not work proper over longer period the bow will come back to my clinics and I will redo the handle as described. For now its gathering more experience.
Apart of that I find it a very smart and cool takedown solution, well doable with little material.
Cheers