I have investigated it more carefully:
Broadcaster sends only shortText.
VDR reads the Epg event. At EpgBugFix #6 VDR moves shortText to description if description is empty
EPG in this state are saved in epg.data.
After restart VDR reads epg.data. Then scans this event again. Event already have description, so it doesn't make BugFix #6 and now we have shortText and description the same.
Not exacly the same. Becouse "old" descrypion is after BugFix corrections. So there is no BugFix #7 corection. But at the funcion end we have the same texts.
I have commented EpgBugFix #6 and VDR now works correctly.
Boguslaw Juza