[bug] cookie consent pop-up keeps appearing

With every pageload, the cookie consent window keeps popping up. It remembers my choices, but appears again on every pageload. This happens only on my phone (iPhone X, IOS 14.6), on Firefox Daylight 35 and the latest Safari. Clearing the browser data doesn’t seem to help, unless I’m not doing that properly.
After clearing the browser data I rejected all cookies, rejected the legitimate interests as well and closed the dialog. But the pop-up keeps appearing every time a page loads. Accepting all cookies also doesn’t seem to solve the problem.