When you play the solar warlock subclass attunement of sky and use the sunbracers, the grenade recharge doesn't work sometimes when "heat rises" is active. Without the "heat rising" effect, solar melee ability kills recharge the grenades, with the effect active it sometimes bugs and wastes the meele without triggering the recharge.
Hi there, We are aware and are currently investigating this issue. Please visit our Known Issues list for other Season of Dawn Known Issues. https://www.bungie.net/en/Forums/Post/254628234?sort=0&page=0