Rrd4j: all historical data are gone (kind of ...)

Windows 10, 3.2.0-SNAPSHOT - Build #2554

openHAB crashed hard, I couldn’t even kill the karaf console and I had to reboot. Now the Item Analyzer doesn’t know anything about historical data (rrd4j persistence). rrd4j persistence seems to work now, but historical data (several months) of all items are gone:

I checked the log: the last messages are:

'LokaleSonnendaten_Position_Elevation' changed from -XX.66352681578701 ° to -XX.38343551807196 °
2021-11-26 01:08:30.905 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'LokaleZeit_DateTime' changed from 2021-11-26T01:07:31.964+0100 to 2021-11-26T01:08:31.965+0100
2021-11-26 01:08:30.906 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'LokaleZeit_String' changed from 2021-11-26 01:07:31 MEZ to 2021-11-26 01:08:31 MEZ




So the data are there, but the Item Analyzer seems to suffer from amnesia.

Any hints on how to tackle this problem are welcome. Thanks in advance.

Without further intervention from my side, all historical data are back …