Cannot move apps to sdcard: No space left

I am running CM 12.1 (20150916 stable) by novafusion on my S3 Mini. When I try to move apps to the sdcard, I get an error saying that there is no space left on the device. The sdcard works fine on my Galaxy Note. It is formatted with FAT32 and more than enough space left. I created an issue on github, but I don't think that this will ever be resolved. Other issues also never got responses.

Does anybody know a solution or the right place to post a defect?