Float is not stored to influxDB

Ubuntu 16.04
icianga2 version: r2.8.4-1
influxdb v0.10.0

I wrote a python plugin, which generate performance Data. Icinga store almost all this data successful to influxDB.
The values are in scientific notation - should not be a problem…
If a value is lower than 1.0E-5 the value is not stored in influxDB anymore. InfluxDB should provide 64bit float - should not be a problem as well…

Is there a limitation of the performance values, shipped by icinga to influxDB?
I followed this documentation: https://nagios-plugins.org/doc/guidelines.html#AEN200
Please let me know, if i can provide more inputs!

Thank you very much!