Ok, so I deleted the arcade platform and added again yestarday and the problem persist.Maybe the issue is also in other platforms, but arcade is the most that I using now and its very difficult for me to find the problem because its ramdom and its not happening all the time when I add game to favourites or mark like broken, but yes very often.
Maybe is another xml. that its corrupt, maybe settings?, I dont know where more to look or fix the problem, anyone from Launchbox staff can help me, please?.
Many thanks!.