Openhab frozen Charting

Hi))) let me ask.
my usage is : openhab on raspberry pi 3 B+ ,
installed mqtt binding and rrd4j persistence ,and openhabcloud
through mqtt i connect to my arduino to raspberry which is my broker.
arduino sends humidity and temperature
[%.1f] is use only numbers.
rrd4j is
everyMinute:… etc
Chart_Group*: everyMinute,restoreOnStartup

first 2 or 3 minutes it is ok. shows me the chart … everything is working .

and then it is stops working .raspberry goes offline .openhab stops .and i need to restart it again.

i have no idea .))))))) interesting thing is when i clear rrd4j adn remove chart every thing is ok