summon Totems and Caster mastery for chests

Hi GGG

For the first time since league start, I played a char who took a caster wheel and had a spare point to put in the 25% chance to open a chest when you cast a spell.

I was very disappointed when I saw that summoning (a lot because I use flamewood and the 1sec taunt mastery so if I want to be myself not the target I summon a lot) my Rejuvenation Totem (who has the spell tag) wasn't opening any chest ;(
In Settlers league i'd basically have said nothing, but in ruthless where I open every chest, break every pot, basket or turn any stones to hope for a gem it's pretty disappointing.
Having to spam my curse at some place crowded whith jars & chests is finally not really esier than clicking them myself besides having spammmed my totem at that same place a few seconds ago :'(