
The rules as written for a Heavy weapon are as stated: You have Disadvantage on attack rolls with a Heavy weapon if it’s a Melee weapon and your Strength score isn’t at least 13 or if it’s a Ranged weapon and your Dexterity score isn’t at least 13. The character has a dexterity of 17, and when we roll to attack with a Heavy Crossbow, when rolls are set to Automatic for determining advantage/disadvantage, the attack is always at disadvantage. I tried setting the character's Strength to 13 as a test, and this fixed the issue. Rules as written, since the character's Dexterity is at least 13, this should not impose Disadvantage