Hi Dan,
Thank you for your answer. When looking at the RH-51463 I can nearly second your observations:
I am using RhinoWIP (6.15.19071.17016, 2019-03-12).
When performing step 3., I get the beach ball and a delay on keyboard/mouse action. To exit the edit mode of the leader, I have to press „esc” twice and the spinning beach ball delays each keyboard entry.
No crash over here, luckily.
Only the annoying beach ball issue, which bogs down a smooth work flow.
Regards,
Bernd