After the September Pixel Watch update to Wear OS 5 ran into issues, Google released a fix in November and said its wearables would have to wait until March for another update.
However, that March update and Google’s first attempt at an April update introduced some bugs of their own, and now it’s rolling out the April update again (version BP1A.250305.019.W8) to hopefully get Pixel Watch owners on Wear OS 5.1 without all of those problems.
[support.google.com]