Perhaps this is related to Does TT only work when app is open/in background?
In order to get the remote to actually control my Apple Homekit lights, the app must be open and active.
If the app is in the background and my phone is open, when i click the remote my phone buzzes, but lights do not change.
If the app is in the background and my phone is locked, when i click the remote my phone buzzes, but lights do not change.
If the app is closed, when I click the remote, nothing happens whether or not my phone is locked or open.
Something else I noticed: if the app is closed, I cannot find the remote via bluetooth. In order to establish a bluetooth connection the app must be open or in the background.
The remote has firmware v6.
Any other info you need? I have no idea how to further debug this.