I am currently using the Linux Preview on Ubuntu 20.04 LTS with the Suckless DWM tiling Window manager. Whenever I launch 1password, it launches, asks me to enter my secret, and then a few seconds later, another window pops up asking for my 2FA code (I mentioned my WM in case the fact that it is tiling and opens the window next to the original window has any bearing...I don't have a non-tiling WM setup right now to test normal behaviour). I have found that I can view I can use 1password to view all my information and reveal passwords without entering my 2FA, and I can even close the 2FA window without closing it and still access my secrets!
1Password Version: 0.8.0-22506
Extension Version: Not Provided
OS Version: Ubuntu 20.04 LTS
Sync Type: Not Provided