On the GitHub Actions environment, the mock HTTP server often fails to start:

java.net.BindException: Permission denied
	at java.base/sun.nio.ch.Net.bind0(Native Method)
	at java.base/sun.nio.ch.Net.bind(Net.java:479)
	at java.base/sun.nio.ch.Net.bind(Net.java:468)
	at java.base/sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:220)
	at java.base/sun.nio.ch.ServerSo

Add TR-thread.

A good starting point (thread specs including tolerances) is here..

Something goes south when accidentally entering '+' or presumably other regex characters, this might be because of how strings are managed on the python side. Could there be some way to escapte these characters before filtering?