A couple of years ago I reported issues with using my Tomtom in Cyprus. I've just returned from Malta and have experienced similar problems.
Navcore: 7.917 Map Europe IGB West 945.6243
The kit seems to think that Malta drives on the right and gives warning messages to this effect on establishing the route.
The advance information symbols show the direction as counter-clockwise round roundabouts ....although....
the spoken instructions and the live maps are correct showing ...