Blocking users is not working anymore as expected

[VolkerJunginger]

Your use case

Blocking users does not work anymore as expected.

• Blocking a user should hide the users messages: This is not always the case anymore.
• The timeline seems to "drop" recent messages so the last messages on the screen are from weeks / month ago.
• Unblocking the user does not bring the timeline back in it's original state. The messages are still from the past & some messages of the blocked user seem still to be hidden.
• Sending a new message in this room seems to restore the timeline.
• When a user is blocked the "blocking" call to action is not updated the first time. The button still gives the option to block the user even though I just did that.

The behaviour is quite irrational but seem to be similar on iOS and Android so I suspect this is an SDK issue.

Have you considered any alternatives?

No response

Additional context

No response

[manuroe]

Volker is seing this issue on element.io. BWI can see them on their HS. The behavior is as expected when I test it with my matrix.org account.

[manuroe]

@kegsay can you share any thoughts on this when you are back?

[manuroe]

I tested it again on m.org and it did not work. See the linked rageshake and its sister rageshake. @bnjbvr raised a suspicious piece of code at https://github.com/matrix-org/matrix-rust-sdk/blob/96a4b06ca69d44cd03f1646b0b78295887c7bb70/crates/matrix-sdk-ui/src/timeline/builder.rs#L212-L225 where the timeline is cleared but not reloaded.

[bnjbvr]

https://github.com/matrix-org/matrix-rust-sdk/pull/3378 should help with this.