actually something happened to me and a few days later the touchbar don't work anymore.
Really sorry for that late reply.
Mine Touch Bar was working but not showing any icons. Displaying was broken.
There were more problems. All the time restarting during standby mode. ( Crashing, emergency restart )
Also sometimes system didn't start - safe mode - I had to reinstall system. I lost all data ( sic! )
There were two repairs.
During first they changed motherboard and Touch ID - problem was still there ( fatal repair service ). During second one they replaced top case and IO board. That one resolved the problem.
So I got MacBook with almost all new parts ( battery, ssd, MB, speakers?,Touch Bar, Touch ID,keyboard ),
only old items - display and flap. I suppose better would be giving me new one, but in Poland repairing is priority ( more cost effective? )