Clip Title UI disappearing
In some conditions, the UI for Title Clips disappears. The box under Clip/Transition turns empty when a Title Clip is selected. It is no longer possible to change the Title for instance. Unfortunately I haven't been able to produce a minimal xges to reproduce. With the proper file, the issue can be resolved by selecting a different clip (not a title) and restarting Pitivi. The disappearing only happens when the last selected element was a title when Pitivi was closed, then re-opened.