I have a question about the spell hypnotic pattern: if nobody attacks or shakes the creature, the creature stays in that condition for the duration even if the concentration is lost?
The spell is clear stating that the spell ends for the affected creatures when they get any damage or someone shakes them, but it never says "or when concentration is stopped"
So I was thinking: It is possible that the duration of the spell of 1 minute means that the spell remains in the area working that entire time? I mean, if another creatures enters the area then it has to make a save in order to avoid the charm.
If the concentration is lost then the spell ends for the area but the affected creatures stay incapacitated (because for them the only way the spells ends is being damaged or shaked)
I want you people to let me know why this approach could be wrong because that's another way to understand this spell
Or is this a DM interpretation?