https://quic-tracker.info.ucl.ac.be/traces/20180322/144 sends a STOP_SENDING frame on stream 2 in packet #8. An implementation should close the connection, ATS does not. Note that there is a bug in this test which prevents the sending of ACKs past packet #8.
quic-tracker reported this and I could reproduced this with latest quic-latest branch (a34cac1)