Issue adding cards on mobile browser

{"ops":[{"insert":"I'm running Firefox on Android 9 Pie, and when I go to edit my decks, scrolling down the list causes the decklist pop-up to appear to \"hide.\" The contents become invisible, and you have to get clever to find the Save Changes button. Has this been reported by anyone?\n\nLink to screenshot: https://imgur.com/a/6sxVPwa\n"}]}