planetmaker opened the ticket and wrote:

trunk r19154:

Open the scenario editor and select the industry construction window.
The "many random industries" is selected and the "build" button at the window bottom active
Select now another industry and re-select the "build many random industries". The "build" button will be grayed out and inactive.

The button will only become active again for "many random industries", if the window is closed.

Reported version: trunk
Operating system: All

This issue was imported from FlySpray: https://bugs.openttd.org/task/3632