Hello,
Recently, Body Battery widget has stopped to show data on Focus Section.
When I refresh the page, I quickly see data for 1 second then it disappear.
I tried with two differents browsers (Firefox & Brave) on Linux
And do you have any Body Battery data when you go to Health Stats » Body Battery? If not, then the watch either did not record any BB (for example because it was not worn, or the HR sensor is off), or the syncing failed. Check whether your watch shows any BB data.
Mine is all right, so it does not seem to be a general problem.
When you click on the panel, and land on the detailed screen, the graph and the data are there all right? You coud try reloading the page, clearing the cache, trying yet another browser (I tested Chrome, Edge, Opera, and Firefox - all fine), disable browser extensions, but that's about all I can advise. Perhaps I would double-check that the date and time, and time zone are identical on the watch and on the computer. You could also try removing the BB In Focus panel, and add it back later.