All feeds gone since app-update Apr. 2021 on ipad to Ver 5.5

[Guest]

since the app-update Apr. 2021 on ipad to Ver 5.5 all my feeds are gone in x-feeds
I am using iPadOs 13.6.1
Description:
I start the x-feed app an there is only the nothingeverywhere welcome screen, so a perfect name for the situation:
Categories: all empty
All feeds gone.
Some times, after giving various icons a try, the feeds & categories came back. Especially the icon top right to hide and recall the feed-side-bar seams to be helpfull.

On iphone I could not observe this behaviour.

[Guest]

Since 5.5 when you open the application it shows blank where the feeds are. If you click on the ‘expand’ symbol on the top right twice, they reappear.