@Ridgehammer A workaround: the blue object contains 2 blue fills, and this is not handled correctly. Remove one of the fills in the Appearance panel, and then merge should work. I will fix this bug for the next build

@marce said in Interweave two texts: Is there something i can do to solve this issue? The intertwine or the GPU preview issue? The GPU preview problem os most likely caused by some incompatibility with the CUDA driver. What is the NVidia CUDA version you have?