Tabs not syncing between mobile and desktop

A few days ago, I tried to send a tab to my desktop, and it didn't work, but I'm used to sent tabs not working, especially when I'm away from my home network, so I kept the tab open on my phone until I could pull it out of my synced tabs on desktop. But when I went to do that, my desktop browser was showing a list of synced tabs that was days old. I tried manually forcing syncs, but that didn't work. So I signed out and back in on both the desktop and the phone and I re-paired the devices, and now neither device shows any synced tabs even after after hard refreshes.