Hey Maja,
I haven't personally seen this behavior, but there's a similar issue logged in LCS.
fix.lcs.dynamics.com/.../NotFixed;qc=56d898f8a3ff20085fbdc450285cff99ebfbe8b80c02e8a37dedf3fe0a8b9a01
It's possible that the problem you're seeing is caused by the same issue. If so, it looks like it's a known bug and has no fix planned.
-Jake