pdf highlights disappeared again under Android

[HansiMeier]

Hi there! I posted an issue about disappeared highlights before. Unfortunately, I couldn't find the old post anymore, so I write a new one. After a quick fix, everything seemed to work nice. But now they disappeared again. I working with Samsung S4 tablet under Android, all software versions should be up to date. Do you need example files or any other information on my special case? Any suggestions what I can do?
📚 Reiner Keller÷Diskursforschung Annotation 1.md