Hi, not sure if this has been reported before, but there is a case (for the summoner) where the UI Display for the number of minions the player has is incorrectly updated/reported.
This happens when the player summons 5 type of minions, the Shadow Minions and a pet (EG Nautilus),
all together 7 types of minions (Normally the display can only show 5.). When that happens, if the player goes into a rift/change level, there is a high chance for the UI Display to completely bug out. Sometimes the minion icons within the display does not even show, and the numbers do not update correctly. This might be an exceptional case, as the default 5 minions work fine, 6 too.