I'm not sure if the problem is system-related or a bug.
If a script tool is aborted by an error or tool change, it cannot be executed again afterwards.
I could build again after an error. After a tool change, of course, you have to load the script again. Please give an example script and the situation.
The tool builds over a way (road, rail ...) at the next highest speed.
Take any map. Use the tool to click on 2 fields of a route that is connected. Switch to the inspections tool while it is running.
If you now want to use the script tool again, nothing will happen.
[edit]
download delete
Two click script tools were not properly cleaned up after exit. Fixed in r11636