How to find out for which program certain hotkeys are clogged?

Question

Windows

Sublime Text 3 combination ctrl+shift+a stopped working, most likely one of the other programs is interrupting, because everything is ok in the settings. How to find out who exactly interrupts this combination?

Answer 1

Try to end the processes of all programs one by one through the task manager, while checking the ctrl + shift + a key combination in Sublime Text. If, when you turn off a certain program, Sublime Text starts to react to this combination, then this program interrupts.
Although it also seems to me that even if the key combinations match with another program (which runs in the background, but catches global keystrokes), then the action should be performed in both Sublime Text and that program.

Answer 2

I went to Preferences → Key Bindings - Default found the keyboard shortcut "ctrl+shift+a" and copied the line

{ "keys": ["ctrl+shift+a"], "command": "expand_selection", "args": {"to": "tag"} },

Then I went to Preferences → Key Bindings - User and pasted it there, this is what happened:

[
  { "keys": ["ctrl+shift+a"], "command": "expand_selection", "args": {"to": "tag"} }
]

After that, the combination worked.