@SweetP So my system ended up then having some sort of issue, I don't know what it was related to. My dock grew three active 1Password icons, two Firefox browsers, and I couldn't shut down via menu, had to button-press my iMac into shutdown.
I relaunched and some weird housekeeping needed to be done (I had to re-permit full disk access to Backblaze, for example) but after relaunching Cookie and setting it up again like new it seems to be working.
So it probably wasn't an issue with the app...