I can confirm that I am experiencing this exact same issue on Fluxer Desktop 0.0.8. Several other users in my community have also reported the same behavior, so it's definitely a widespread issue. Additionally, I’ve noticed that when switching between different chat channels within the same guild, some members appear as offline or completely missing from the list, even though they are actually online. The list consistently goes blank when the app is on a secondary monitor and loses focus. Resizing the window or clicking back into the community seems to force a re-render and brings the list back temporarily.
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Comment by @onurktrc