We exchanged my AI for another last week at my fat guy because my tacho needle had the wildest twitches

Since then I have noticed that after some driving time in the gear indicator the "P" disappears...or the "N"...from time to time the "R" and the "3" are dark

When I go to "D" and it's just dark and I switch to "3" then the "D" will appear again...... I go back to the "D" it's dark again

Transmission switches completely normal and the phenomenon is only since the change of AI's
And strangely enough, since this day of change, the interior lighting no longer works when I open the doors. But think this is rather coincidence and has nothing to do with AI, right???
Any idea what that could be ?????
Greetings Jürgen
