Contradiction with Exodus 33:11
This verse mentions God speaking to Moses face to face, as a man speaks to his friend, while Exodus 14:1 suggests God spoke to Moses specifically to convey instructions, indicating different modes of communication.
Exodus 33:11: And the LORD spake unto Moses face to face, as a man speaketh unto his friend. And he turned again into the camp: but his servant Joshua, the son of Nun, a young man, departed not out of the tabernacle.