The Bearheart barbarian has a unique quirk that makes the end of combat more frantic than it needs to be.
That subclass has a healing ability called Unrelenting Ferocity. It costs a full action and is only available while raging. Notably, a barb's rage ends if they neither attack nor take damage for a round. This means using Unrelenting Ferocity usually results in ending rage.
There is one window where the Bearheart barb can heal without wasting a rage charge: after a combat ends, the barb will keep raging for a few seconds. If they're ready for it, a player can immediately select their barb, quickly select the heal ability and click anywhere on the screen to activate it before rage ends. It's doable but not easy, especially if the player is caught off guard by the end of combat.
It's been mentioned elsewhere several times that the game should afford a grace period immediately after combat to handle emergencies like downed companions, dangerous surfaces etc... The race to heal the Bearheart barb is another reason why the end of combat could be handled more gracefully.