Just another observation: I remember some great explanation by @rossko57 and @rlkoshak here and here that using start levels as triggers for rules is not the most reliable thing to do. However, they got the job done on OH 3.3.
After having upgraded to 3.4, everything above Start Level 70 (80 - Things Initialized and 100 - Startup complete) are not working for me anymore (rules just not getting fired).
Anyone else making the same observation? Or just related to my specific setup (have a hypothesis already which I have to test).