The accelerator is correct to use, as it will activate the buddy associated to to label... which is wrong, as quickTileLabel does not exist.
Did you try changing the buddy of quickTileLabel to kcfg_ElectricBorderTiling?

Push it to Plasma/5.19, please.

https://invent.kde.org/plasma/kwin/-/commit/914065ae66b0a8e147ca398450346242c8d3cc3c
Pushed!

@zzag How do I close this revision and also will the bug will get close itself?

Re: Commit subject line

Please use more descriptive subject lines and put the BUG keyword in the commit message.

How do I close this revision and also will the bug will get close itself?

Since the commit message doesn't have a link to this revision, I guess the only option is to abandon it?

In D29343#674536, @shubham wrote:

https://invent.kde.org/plasma/kwin/-/commit/914065ae66b0a8e147ca398450346242c8d3cc3c

This commit broke Plasma/5.19 branch.

We've filed a sysadmin request to reset Plasma/5.19 to the latest good commit (1a50c98f4a99bce3363561b953ff8d92b8f1a33a).

Plasma/5.19 has been reset. Can you please create a merge request on invent.kde.org/plasma/kwin that fixes bug 420563?

@zzag @davidedmundson https://invent.kde.org/plasma/kwin/-/merge_requests/47