emulator: firebase-admin vs web app data not the same?

[benomatis]

I'm using javascript scripts to manipulate my firestore db data via firebase-admin, however, for some odd reason, anything I change via the scripts would not reflect in the web app using the same firestore database, and vice-versa. This used to work very well for quite a long time, and is otherwise working perfectly outside of the emulator (on my live site), but for some reason the emulator works differently.

I first thought that maybe somehow it uses a different db now as the emulator now supports the multi-db structure, but I use the default everywhere and never defined any other. I'm sure I am missing something, but can't figure out what it is...