There is an icon that looks like a spray can on the right side of the Touch Bar (4th-5th button from the right?)
Does anyone know what it is for?
(Sorry I couldn't find an image of it on the web)
MacBook Pro Touch Bar – What is the ‘Spray Like’ Icon?
touch-bar
Related Solutions
I used to have the same problem with my MBP. Just brought it to the appleStore in Oberhausen(Germany) it was a hardware trouble which could be fixed within 2 hours.
I didn’t need to pay for that. So if you want to get a quick solution you should go to the appleStore or a reseller. It could be a bad cable, bad power adapter or something internal needing replacement or reseating a cable.
Hope that this helped you.
One solution (albeit, a bit of a hack) that I found is to place a wireless magic keyboard over the top of the built-in laptop keyboard.
If you place it in the right spot, it doesn't press the underlying keys (although see Karabiner information below to stop this issue).
As someone who despises the low action of the butterfly keys, this has the double benefit: (1) it restores traditional escape and function keys, and (2) it provides the awesome keyboard experience of the magic keyboard. It also means that you can use the trackpad.
It can also help to use Karabiner to disable the built-in keyboard when external keyboards are plugged in. This overcomes the problem of accidentally activating the keyboard undeath when pressing firmly on the magic keyboard. For details on how to do this, see this post: https://apple.stackexchange.com/a/235266/11747
Best Answer
It seems to be linked to the simulator in Xcode.
When pressed this expands into some debugging shortcuts as shown in this screenshot:
You can also see this icon on 9to5 macs article about the touchbar. 9to5mac link