I have a range of touchbar presets set for various applications - the main goal is always to remove the damned ESC key from the touchbar (which i otherwise hit 10 times a day losing countless hours of work but thats an aside).
This works fine some of the time however after a while if i switch to a new app the touchbar defaults go back to the mac OS settings (and the dread ESC key returns!)
If i open BTT Preferences then go back to the app the BTT touchbar presets return.
Affected input device (e.g. MacBook Trackpad, Magic Mouse/Trackpad, Touch Bar, etc.):
Type of Mac: MacBook Pro 13 inch (2016) macOS version: Sierra 10.13.4 (17E202) BetterTouchTool version: 2.503 (841)
attached a screen shot of how i have FF set up for instance ...