The parameters being used changed with some recent Lemmy version. Fixed for the next version!
Boost For Lemmy
Community of the Android app Boost for Lemmy
I think it's because your instance is on 0.19.4 and that changed something with hiding posts
That was my first thought as well! But I also tried LW which is still on 0.19.3, same problem.
Edit: My bad! I had "show read posts" enabled on my LW account, and read posts are correctly hidden when I disable it. So it really seems to be a problem with the new version.
Huh, I'm on lemmy.world and it works perfectly fine
If you use your lemm.ee account, it doesn't matter which instance you visit in Boost. It is always tied to the functionality of your account's instance.
I switched the account in the app, so it should use it and fetch content from LW.
how do I visit a different instance so that the setting works?
Never worked as expected for me too. I've switched to voyager, working great there.