Contradiction with Exodus 2:23
This verse mentions the death of the Pharaoh, which suggests a change in leadership, while Numbers 20:15 refers to "the oppression" by a generic Pharaoh without mention of leadership change.
Exodus 2:23: And it came to pass in process of time, that the king of Egypt died: and the children of Israel sighed by reason of the bondage, and they cried, and their cry came up unto God by reason of the bondage.
Contradiction with Exodus 14:11
Suggests that the Israelites attempted to leave Egypt willingly because they blamed Moses for leading them to die in the desert, contrasting with the idea in Numbers 20:15 that the Egyptians hospitably received them.
Exodus 14:11: And they said unto Moses, Because [there were] no graves in Egypt, hast thou taken us away to die in the wilderness? wherefore hast thou dealt thus with us, to carry us forth out of Egypt?
Contradiction with Deuteronomy 26:6
Clearly states that the Egyptians treated the Israelites harshly and afflicted them, contradicting the sense of dwelling mentioned in Numbers 20:15.
Deuteronomy 26:6: And the Egyptians evil entreated us, and afflicted us, and laid upon us hard bondage:
Contradiction with Acts 7:19
Acts states that Pharaoh "dealt subtly with our kindred," suggesting direct oppression against the Israelites, contrary to the dwelling aspect mentioned in Numbers 20:15.
Acts 7:19: The same dealt subtilly with our kindred, and evil entreated our fathers, so that they cast out their young children, to the end they might not live.