Didn’t measure it as I was definitely just trying f to get it on last night before any more Crud fell in the waterHave you measured the cover ? Manufacturers stretch the truth sometimes and the 24 might be 23.1. Then factor in the tent from the pillow and it could be on the verge of too small. I'd lose the pillows before I bought another cover.
It very well could be most/all covers. Shrinkflation has hit everything else, why not this too ?

Based on last years cover it does seem about a foot less. Thought about removing the pillow too. I’ll take a pic and in a few.