Keep getting these messages. Ran a taint log and here is what it is showing.

9/17 09:43:57.983 An action was blocked in combat because of taint from HearthRoulette - EditMacro()
9/17 09:43:57.983 Interface\AddOns\HearthRoulette\Addon.lua:97 _UpdateMacro()
9/17 09:43:57.983 Interface\AddOns\HearthRoulette\Addon.lua:35 ChooseHearth()
9/17 09:43:57.983 Interface\AddOns\HearthRoulette\Addon.lua:49 UpdateItems()
9/17 09:43:57.983 Interface\AddOns\HearthRoulette\Events.lua:35 ?()
9/17 09:43:57.983 Interface\AddOns\HearthRoulette\Events.lua:8

Also, usually happens right after a fight has completed. Happens once and then no longer shows the messages, but they are logged multiple times in the taint.log

Thanks for letting me know! This should be fixed in release v0.5.