Momentary confusion refers to a brief period of uncertainty or lack of understanding. It is a temporary state where you feel unsure or puzzled about something, but it doesn't last very long. Full definition
His arrest caused momentary confusion and panic at the Secretariat as security men went after him shouting,» Bring that result». (punchng.com)
Things devolved further when the White House economic adviser Larry Kudlow suggested Haley had «momentary confusion» when she announced the sanctions on Sunday. (businessinsider.com)
She's a very effective ambassador, but there might have been some momentary confusion about that.» (nytimes.com)