Inconsistent Flavor

[SBBH]

I have been brewing an all grain Irish Red Ale recipe and it has been very consistent. I typically BIAB and I keg my beers. The last batch that I brewed on 2/23/22 was 5 gallons and I performed a partial boil. I tapped it this past week-end, and it tasted really good, but it was not my Irish Red. It was much darker and it has a strong molasses flavor.

The strike temp was 160F and it came down to 153F after I introduced the grain bill with a healthy stir. I flamed out at 170F and the sparge took 40 minutes. Any ideas on why the different flavor profile?

 

[seatazzz]

With no other information, I would lean towards oxidized. Also, 2/23 was 7 months ago; could have aged out into something different. By partial boil, what exactly do you mean? Also, your recipe/hop schedule would be helpful.