@TheCard
Mine has done the same in recent weeks. Even though my purchase history would show it to be legitimate. I'm thinking random alerts perhaps is a thing. I'm glad for them, and I have purchase alerts set up so I'm immediately informed of my card use.
I also double checked the fraud text alert number to verify it to be authentic. Interestingly, a week or so after receiving the alert, my bank sent reference numbers they use for all text alerts. I've kept it for reference.