I think thats related to a post several of us have already noted, where MY26 is a getting an update, but MY24 & MY25 are expected to get a different one in "june".
I am however surprised that they were doing that as an OTA update - this is encouraging for future OTA....
My MY25 goes into the shop Friday morning, and maybe by the end of the weekend they will tell me if they have the battery updates for MY25