An old post but I found a setting that worked for me.

I'm using OpenVix 5.3 (April 2020) on a H7 box and I had this problem as well.

Problem; when in the Favourites bouquet service listing (the one that lists vertically down the left hand side, and not the graphical EPG the sits across the whole screen), you select Menu -> Enable move mode, and it takes you back to the Favourites service listing. Activating the select button on the Favourite entry you want to move just opens that service and the service listing disappears. The Select key should highlight the entry instead so you can move it up or down with the remote control cursor keys.

Menu key (on remote while the EPG is off) -> User Interface -> Channel Selection -> Enable Multiple Bouquets -> Yes.

Setting the above option to Yes allowed me to highlight and then move a Service (channel) name that I'd added to the Favourites bouquet, without switching to the service when I hit Select.
Once you've finished moving all your service names in Favourites, remember to go back into the Menu option and disable 'Move mode'.

Hope this helps..