Open Links pushed from device to desktop Chrome were opening as tabs in 1 window, now many windows open

I started using Join recently and it's been great so far!
One issue has emerged. Previously all the links I pushed from Android Chrome would open on Desktop Chrome as tabs in one window.
Now they're opening in separate Chrome windows.
I've played around with Join and with Chrome settings to no avail.
Would appreciate help with this since I push a lot of links and all those Chrome windows opening is not optimal.
Thank you!
Edit: To clarify, if I push from my phone while Chrome is open on the computer it adds a tab to the open window. But if I'm logged out and then open Chrome on the desktop, the pushed links come up in multiple windows - would prefer they come up as tabs in one window.