I'm testing my existing web extension with the new iOS version and browser.cookies.getAll({url: "https://myurl.com"}) stopped working. It returns an empty array. Is there another way to get the cookies?

I have a macOS safari web extension and It can read the cookies of my website, but when I fully close safari and open it again the extension can't read the cookies anymore. When I try to inspect the cause in the console (safari > develop > web extension background content) everything starts to work again. My safari version is 18.1 (19619.2.8.111.1, 19619)