It seems like when the Micro.blog iOS app beta has been in the background for a while (e.g., a few hours), it’ll launch to a blank timeline as shown in the screenshot. To work around this, I can either pull to refresh or kill the app and relaunch it.

(Submitted as TestFlight feedback, too.)

A screenshot of the beta Micro.blog iOS app showing a blank timeline.
Angelo Stavrow @AngeloStavrow