thanks for that! I restored factory defaults with 02.06.1, and now it works.
TRB1_R_00.07.00 is not usable (tested before) because:
- LTE no connection (although IP is assigned), only 2G
- IPSec routing to central gateway doesn´t work.
So TRB1_R_00.07.00 doesn´t fit to my needs. The former version does it.