After more than 15 years covering everything Apple, it’s with a heavy heart we announce that we will no longer be publishing new content on iMore and the iMore forums will be closing as of November 1st, 2024.
That's normally an indication that there is activity on the data connection. Something is uploading or downloading; OS update, iCloud backup, carrier network settings update, etc.
It's a known bug (there's a huge thread about it over on the official Apple forums). If I leave it alone it will sit there spinning for days eating the battery. I have to go into Settings and reset my connection to make it stop. It'll go away for a few weeks, then come back.