I was playing Gambit as a Stasis warlock, using the mods Elemental Shards, Font of Might and Font of Wisdom with the Syncopation pulse rifle. I was also using Iceflare Bolts and Glacial Harvest. The bug i found was that, though Stasis Shards did proc Font of Wisdom, giving me 30 seconds of increased intellect, it did not proc Font of Might to give me 10 seconds of increased stasis weapon damage. My damage numbers did not not change and I did not see the typical elemental weapon damage boost buff on the side of my screen. That buff does appear when i use a similar build on the Void subclass, so i suspect the problem is in the interaction of Stasis Shards and Font of Might.
Edit: Bringing in some additional knowledge from my reply below.
It says Elemental Shards specifically does not apply in Crucible, Iron Banner or Trials, and does not mention Gambit. Additionally, if Elemental Shards shouldnt work in Gambit, then that means Font of Wisdom is bugged, as it was proccing.
Ive gone into a Gambit Private match to test, and the same setup on Void works, proccing Font of Might upon picking up a Void Well. That implies that Stasis is bugged, not that Font of Might or Elemental Shards is disabled in Gambit.