Problem with large DE numbers

Duckling has problems detecting large numbers in german.

For example "_in fünfzig tausend sekunden_" will be recognized, but with the correct spelling "_in fünfzigtausend sekunden_" it doesn't work.
Another example: "_in vier tausend vier hundert tagen_" does work but "_in viertausendvierhundert tagen_" doesn't.

According to spelling rules you should write numbers < 1.000.000 together. Like this:
3.333.333.333 = _drei Milliarden dreihundertdreiunddreißig Millionen dreihundertdreiunddreißigtausenddreihundertdreiunddreißig_

Tested at: https://duckling.wit.ai/ and with rasa/duckling container.