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The bug wouldn't affect the accept button taking you to the log in page. That would generally indicate that JS has not loaded properly, which is likely just a side-effect of pausing the loading to catch the notice flash. In any case, I can't reproduce that behavior locally or on your site when allowing the page to load fully.

In any case, you can replace js/xf/preamble.min.js with the attached file to fix the flashing.