Simulator is a powerful feature in the software and great for test of new routes prior  traffic by real trains.
But from time to time a train is blocked due a phantom occupied block.
See image enclosed where Di3b is blocked by a red block ahead.
Any tip to avoid this issue?

Found the error in Journey setup, the actual Intelligent Field Display was built up by 2 blocks 58 and 28, 58 was missing in the journey by unknown reasons. See images.
Powerful and very flexible software, therefore setup shit in = shit out.