In a game I'm DMing, the party was in combat with a bugbear. The Oathbreaker Paladin used Dreadful Aspect and the bugbear became Frightened. The Oathbreaker was in sight at all times.
In the next round, the bugbear wanted to attack, and at the time I ruled that he had disadvantage no matter what his target was as per the Frightened condition description. For example, he would have disadvantage even if he attacked the party's Warlock instead of the Oathbreaker.
The next day however, double checking the Dreadful Aspect description, we wondered if he should have only had disadvantage against the Paladin. The feature specifies that he is "frightened OF THE PALADIN", and this is not present in other features that cause the Frightened condition, e.g. Oath of Vengeance - Abjure Enemy or Dragon fear.
Does a creature affected by Dreadful Aspect have disadvantage on attack rolls against all targets, or just against the Oathbreaker Paladin?