Thanks for bumping this. I reproduced the July 17 report using NewsBlur 14.5.4 (279).
The regression came from a recent WebView memory optimization. A story’s WebView could be recreated while the app still considered its content loaded, leaving it blank after swiping back and forth. The fix now detects empty recreated WebViews and reloads their story content.
The fix was committed today and will ship in the next Android release after 14.5.4. The exact version number and Play Store date have not been set yet but should be out soon.