The Molten Overload/Solar grenade stun seasonal mod has a tendency to [i]not[/i] work, almost to the point where you might as well not use it. I tested with every Solar grenade on my Hunter in the Legend lost sector (K1 Crew Quarters), excluding Healing grenade for obvious reasons. Not a single one stunned the first Overload; not even the Gunpowder Gamble explosive works, albeit I didn't really expect it to. After farming the lost sector a few times I managed to get [u]one[/u] stun with a Fusion grenade, but only after the explosion and not initial contact. This issue is not exclusive to Hunter either, I just tested with my Hunter. I also had the Withering Heat mod equipped, which shouldn't have been a factor. Highly suggest getting on this bug sooner rather than later. People are already frustrated with the inconsistency of Overload Auto/SMG/Trace. We need more reliable stun options other than Divinity and some Warlock boots this season.