Both issues are on the topic of updating objects in sets. I think that this issue is different though because it’s related to synchronizing the updates to the object/set view when updating either. The issue you linked seems to be an issue with the filter which is apart of the set view, even when you are updating the object directly in the set view.
The second issue seems to be resolved (or at least not reproducible on my side) in Anytype for Windows v0.27.0.
The first issue is kind of reproducible, but I can still add the Relation I added to the Type for that Set by clicking “New” relation. I think the issue lies in what is expected from the Set. It is my expectation (and I hope this is also how it is designed) that I can add Relations to Object Types to make those Relations available for Objects of that Type. Then, I can add that Relation to be visible in places like Templates, Set View and Objects, but I need to add them myself as adding a Relation to a Type does not automatically mean they are visible in an Object (like a Set). You would still need to add that Relation as a “new” Relation to that Object.