Hello Modernist. I just switched from v77 to the current one, big ups on all the upgrade, your work is golden. Sometime ago i posted here about an issue with having to press stealth twice more commonly in groups and especially dungeons. You were convinced the problem lied with elysium, probably related to the "fizzle" error issue, in repsonse to that i posted a bug report on the forums (they or nobody else reported having this issue after the post).
Anyways, with me upgrading to the newest version of modui which include the option to toggle instant cast on keypress, I had some options in trying to locate this problem, and I think I did.
With instant keypress the issue is present. Without its not. With the snowfall addon on and modui keypress off, the issue is present. With bartender and snowfall on, the issue is not present. So could this be something with instant keypress and your ui? Im not a programmer or anything so I wouldnt know, but if this info is valueable to you or whatever, here it is.