Unknownreported this bug
My MM version is 5.11.2 build5614, and after testing with the example skills from the wiki, I've confirmed that VariableSkill can no longer read placeholders:
[https://pastebin.com/UpSk4eWH]
I tested the effects of ExampleSkill_1, ExampleSkill_2, and ExampleSkill_3 individually, and the particles display correctly. However, if I use ExampleSkill to execute these three skills randomly, there is no response at all.