I thought it was just me.
I did find a thread back from 2016 that helped - use a widget created from the OneUI launcher (the second option under Tasker, that just says Task, not Task Shortcut) and it should launch instantly.
Previously I was using a shortcut created from within tasker, IE Add to Launcher, but that had varying delays and was quite infuriating, but this solved the issue immediately for me, also OneUI 7.
Kind Regards,
Anthony