I was curious and tried to replicate: Works as expected with FMPA 14.0.6 on Mac OS 10.11*)
What Theme is used? Maybe using another Theme would make a difference.
You're with FMPA14.0.5, I'm with FMPA14.0.6
Are all Indents with the Inspector set to 0px.?
Despite the possible causes, it seems bug-like.
Using separate Textblocks for each line could be a work around. At least you could adjust them individually.
Thank you for your posts.
Our Development and Testing departments are aware of this issue. I have attached your post to the original report. When more information becomes available, I will let you know.