Sending a tab from Firefox Preview to my desktop works fine, but when I try to send a tab from my desktop to Firefox Preview, the desktop browser says "Sent!" but the tab doesn't show up on my phone. I've tried this with the phone locked, unlocked, and with Firefox Preview already open and the tab never arrives. (Desktop is Firefox 72.0.1 on Windows 10 Pro. Mobile is Firefox Preview 3.0.2 on OnePlus 7 Pro running OxygenOS 10.3.0 / Android 10)