In The Lord of the Rings: The Rings of Power, S01E08, we see that Galadriel suddenly got suspicious of Halbrand. we clearly see this on the plot which Halbrand started offering Celebrimbor advice on how to make artifacts of power, and called it a “gift”.
The reason of suspicion is ambiguous for me. Galadriel seemed to care about this character as she thought he was the promised king of the southerns and even brought him to receive elvish treatment after he was wounded in war.
Why did she get suspicious? Was him giving advice to Celebrimor a reason?