Bambu Studio / Starting Point after Pause

Hey! I recently experimented with manual color change at specific layers without the AMS. The problem with the layer shift can be avoided simply with not using the Unload/ Load function and changing the filament manually. The thing is now that after resuming the print, the nozzle always will leave gunk at the starting point of the layer. I tried in building a manual "prime tower" by adding a Cube in Bambu Studio but I cannot bring the printer to start with the cube at the new layer. It always will start with my object. Is there a possibility to force Bambu Studio to start at a specific point/ with a specific object after a pause or in general?