I had a BulkAttributeRenamer with the following parameters:
To remove all attributes that have names with invalid characters.
But this setting holds the entire process without error. No features going in. If there is a blocking transformer before the BulkAttributeRenamer you will see log Messages going out of the last transformer before the blocking transformer. But nothing after that. First i thought that the blocking transformer would be the bug. But changing the settings of the BulkAttributeRenamer to Text to Find: [ \\\\] fixes the process.
The bug is in:2019 beta
2019.0.0.1
The bug is not in:
2018.1.1.2