Product and version: FMPA v16.03.302
OS and version: High Sierra, 10.13.2
Hardware: MacMini, 16GB RAM
Description: Customize Toolbar reverts to its default setting when using New Window script step
How to replicate: See attachment
Workaround: See attachment
This issue was brought up in another thread here and I'm experiencing a similar problem where, after customizing the toolbar using Customize Status Toolbar, it reverts back to its default settings after the New Window script step is executed.
In the attached you can see the permutations I used but I'm willing to wager that different combinations of the checkboxes ticked in New Window from what I use will cause grief.
If you can replicate the failures noted in the attachment, some exhaustive testing will be needed to try all permutations of the checkboxes in New Window to find which ones are causing grief.