High background usage on iOS 26

I am on an iPhone 15 Pro Max, iOS 26.1 and using 1Passwor 8.11.18. Since the 2nd of December, 1Password all of a sudden started using between 5% and 15% of my battery as a background task, with 0 On Screen usage. I've tried uninstalling and reinstalling, I've also tried turning off background tasks for 1Password. Nothing seems to stop this. I am now considering just uninstalling it permanently until maybe a new version comes out. I have used 1Password for a very long time, and this is the first time I have really gotten an issue with it. From Reddit it seems I am not alone in this problem. I have also submitted a diagnostic report to 1Password, but maybe someone here knows what is going on and how to stop it ?