DLNA player crashing when trying to view folder

OK, I got this very peculiar error that's making me crazy, before that Serviio was working smoothly for months:
Affected devices: Sharp Aquos LE60E841 TV and Samsung ES6000 Blu Ray player
1. Happens when trying to open a folder names "Movies", when trying to open it the player interface shows the loading animation for a second, then the animation itself stops spinning and a moment later the whole screen goes blank for a few seconds,
2. After a moment the TV goes back to the last used source (in this case HDMI Cable decoder). The DLNA client in the TV seems to have crashed or disconnected because you have to select server again (I have 2 on the newtwork and the one selected automatically is not serviio so this is why I know).
3. The error happens the same way on the Samsung BD player, so it does not seem device dependent
4. The crashes started when I moved a bunch of files from one folder visible to Serviio to another.
I would be grateful for some suggestions, it seems to be crashing on some certain files but I have no idea what is the problem, there are no peculiar characters in the names or anything.
I updated to the latest version but there was no change.
Affected devices: Sharp Aquos LE60E841 TV and Samsung ES6000 Blu Ray player
1. Happens when trying to open a folder names "Movies", when trying to open it the player interface shows the loading animation for a second, then the animation itself stops spinning and a moment later the whole screen goes blank for a few seconds,
2. After a moment the TV goes back to the last used source (in this case HDMI Cable decoder). The DLNA client in the TV seems to have crashed or disconnected because you have to select server again (I have 2 on the newtwork and the one selected automatically is not serviio so this is why I know).
3. The error happens the same way on the Samsung BD player, so it does not seem device dependent
4. The crashes started when I moved a bunch of files from one folder visible to Serviio to another.
I would be grateful for some suggestions, it seems to be crashing on some certain files but I have no idea what is the problem, there are no peculiar characters in the names or anything.
I updated to the latest version but there was no change.