From what I can see it looks like one of the onInputFocus methods has an await/promise for getDesignation and that is receiving the undefined 'e'. When that 'then' block resolves trying to check e.fieldDesignation, I get TypeError: e is undefined.
So far I'm only seeing this on Firefox. I figured you'd want to know, also, a fix would be grand given it's kinda breaking my debugging sessions.
Firefox 76.0.1 64 Bit (linux/Ubuntu 18.04)
1Password Version: Not Provided
Extension Version: 1.19.1
OS Version: Ubuntu 18.04
Sync Type: Not Provided