[quote=Eugerome]Not sure if this is a bug or works as intended:
Attack rolls when attacking with the off hand do not add str/dex modifier to the attack roll.
However, str/dex are added to the damage roll, even without the two-weapon fighting style.
Currently the offhand always get ability mod to damage. In this game, that's what we're talking about

I know, but its a little clearer if you quote PHB and then state the difference.
PHB:
1. When you take the Attack action
2. and attack with a light melee weapon that you're holding in one hand,
3. you can use a bonus action
4. to attack with a different light melee weapon that you're holding in the other hand.
5. You don't add your ability modifier to the damage of the bonus attack, unless that modifier is negative.
Game:
1. Doesnt* require the attack action to have been taken
2. Same
3. Same (albeit forced when using the attack action as it auto makes both attack unless you use the bonus action first, or sneak attack first. BA shouldnt be allowed first and you only get 1 attempt at a sneak, which is also wrong, you can try it until it works)
4. Same
5. Does NOT add modifier to attack and DOES add to damage