Expanse Skill Gem bugs

Adaptive Capability from Gemling Legionnaire ascension is not working on Expanse support gem when slotting it into Gas Grenade. Please see below screenshot:



However, if I try to put in the Suffuse support gem in that slot (which also increases INT requirement by 5 points), it fits perfectly fine.

Also Expanse support gem doesn't show up in options when searching for it in either War Banner or Gas Grenade, even though I have been able to socket it into the War Banner skill.