Hi guys,
I kinda found an exploit in the game as I was playing through the Underdark regarding the Myconid village questline. When you accept the quest to assist the Myconids, one of them asks to follow you to help kill the Duergar to avenge his own village.
This one has several powerful abilities including an ability which summons a white spore cloud which grants haste. If a character enters the cloud it will get an additional action, bonus action and refill its movement. When you leave the cloud the buff fades but the actions and movement gained remains.
I managed to have my characters enter the spore cloud, use their action, leave the spore cloud and re-enter, gain another action and refill their movement bar over and over again to trivially kill anything without ending their turn.
Of course this issue is only limited to the Underdark as the character doesn't seem to follow you anywhere else but...
Let me know if this helps.
