Highrez

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XMBC Version: 2.20.5
Installed or Portable version: installed
Windows Version: Win11 23h2
Mouse Information (brand/model): Logi MX Master 3S
Relevant Computer Information (CPU, RAM etc): i9-13950HX, 96GB
Did the problem occur after an upgrade of XMBC? (If so, from what version?): No
Did the problem occur after a Windows update/upgrade? (If so, from what version?): No
How long have you used XMBC?: 3 yrs
What language and keyboard layout do you use in Windows?: US

Clear description of the problem - try and include as much information as possible, including what button and mappings you are having problems with (if applicable).: I have tried but unable to get this done. Please help on the below action:

Press a button where it will stick until i press it again to cancel it. During this sticky time, i wish to simulate press and hold LMB for 1s, then release. This should repeat until i press the sticky button again to cancel it.

This is what i have tried but not working:-
Middle Button - Simulated Keys: (sticky repeat) [{HOLD:1}{LMBD}{WAIT:1}{LMBU}{WAIT:1}]

That seems to be working here for me in the latest beta, maybe you could try that.
I've also modified the latest so that it will highlight the buttons for injected/simulated button presses (in a different colour (light red)) so it should be more obvious something is going on.

Thanks, it is working good now with beta

Glad to hear it, it must have been in one of the fixes I have made in the last year (difficult to remember them without searching the change history/differences in detail! )