If you summon thorn totems with grove mind near an obstacle, on a bridge, or near the edge of a platform, then it may not summon all thorn totems.
I try to be careful and only summon in the middle of the area but sometimes I have to summon a totem on a bridge or other area with limited space. It feels unsatisfying to only see a few of the totems being summoned.
I think it should summon all your thorn totems against the edge of the area.
I consider this a bug instead of feedback but feel free to disagree.
Thanks!