Wyll, as a warlock, has the class feature to use the disguise self ability, which can make him appear as someone else. However, when Wyll uses said ability and then interacts with his goblin adversaries, the goblins immediately recognize and interact with Wyll based on their history.
This does not make sense, given that Wyll could look like a drow female to them, and yet they still say "look what we have here, the blade of frontiers."
This should be addressed by having the goblins react to Wyll as though he were a random adventurer of the race he is disguised as, while perhaps Wyll's hostility or emotion at seeing his adversaries could be conveyed to us through our tadpole connection. This way the party knows the interaction is important to Wyll, but the disguise self ability is being properly respected by the npcs.
As a side note, I also noticed an inconsistency in Wyll's first story interaction with a named goblin. Spoilers ahead. Wyll asks us not to kill the goblin at first so Wyll can interrogate him. However, after we interrogate the goblin, Wyll communicates to us through the tadpole that he now wants the goblin dead, since he has gotten the information he needs out of him. When we oblige, and choose the dialogue option to kill the goblin, Wyll responds by giving us the dialogue he would have given us had we killed the goblin in the first place, as though the interrogation never took place. Wyll expresses his frustration in our failing to let the goblin live to be interrogated, even though we had already interrogated the goblin, and Wyll had even expressed his desire for us to kill the goblin after the interrogation. The game should properly recognize what occurred in this interaction, rather than always acting as though Wyll's requests went unfulfilled if the goblin dies at any point, even if after the interrogation and at Wyll's request.