Centipede not always setting sanitized_target

https://pantheon.corp.google.com/errors/detail/CNiDuO-3_6iKVg;time=P30D?project=google.com:clusterfuzz&utm_source=error-reporting-notification&utm_medium=email&utm_content=new-error&pli=1&rapt=AEjHL4M0aXmFBxioZrxgPwT6SQ-x8Y-w6ciz3IUeU1oVUTk9p3Ha5MOx8lJtxLeh-LPvN5ENvVzq-GNI1gSbwTvlI9dhJQ2i3g

It seems like the fix is making this log an error and bailing out instead of continuing since we can't recover from this error:
https://github.com/google/clusterfuzz/blob/master/src/clusterfuzz/_internal/bot/fuzzers/centipede/engine.py#L205

I'm not sure why this is happening at all though, I thought centipede isn't enabled (I configured the job but disabled) in Chrome clusterfuzz.