Generated Android assets are not correctly using slices

[Tetrikus]

If I generate android assets from a document with different pages and artboards, some uf them are misplaced and add transparent parts to the side of the images. I tried to attach two examples which where generated to make it a bit easier to understand the issue.

I tried already to delete and re-create the slices but it didn't help so far.

If you compare these two images, you will see, that the _fr version (1st file) is fine, but the _de version (2nd file) is kind of moved to the right and on the left there is a transparent part.