OP, go through your reports with a fine tooth comb. Unless you have a ton of inquiries, I can’t see any way this inquiry would smash your score for 41pts.
Actually, if this were the case the OP would have lost even less or no points. Once someone has a certain amount of scoreable inquiries present on their CR (say 15+) the addition of more inquiries stops impacting score. Maximum scoring penalty happens at a certain point and adding more inquiries won't further lower score.
Maybe it's coincidental, but they email me every time there is any change, and this is the only change there has been.
This is a common misconception. You receive "alerts" for alertable events. There are plenty of non-alertable events that you won't get notifications of, but they can be score-changing events regardless.
There is no way that a single inquiry impacted a FICO score 41 points, so it simply means that something else changed which caused the score drop (and the majority of that score drop at that).