For those who have experienced hidden tracks bug (which I have not been able to reproduce), as a safety net you can do this:
1) Make a custom action like the following:
2) Use this one for the zooming and enable debug mode in the script (change to debug = 1 in the script)
Now, in case you come across this bug you can restore your view to the initial by running action
SWS: Restore arrange view, slot 5. Then please send me the last 6 messages from your Reascript console so that I can reproduce and fix the bug.
Thanks!