It seems that somewhere in the last several releases, fast forwarding a mkv file broke.
I’ll try to forward now and it’s just end up hanging the whole app requiring me to restart from the command line. Otherwise mkvs playback just fine.
It would be good if we could find out more about the file you are having issues playing. Please see the mediainfo section in How to submit a useful support request - General - OSMC
To get a better understanding of the problem you are experiencing we need more information, including logs from you. Please see How to submit a useful support request - General - OSMC for advice on how to help us.