One thing that i noticed is if you try to speed level a minion and you get a skill point twice or more in one fight you will not have the skill sheet pulled up and lose 1-2 skill points. It will however give you 2 skill points the next time you level to a level that gives a skill point so gaining 2 skill points a level might be working as intended but 3+ is not.
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 "Berzerk Ball 2")