Since the migration of our project from 4.11 to 4.12, we have a problem with lights building.
When we build the lights everything works as expected. We can then PIE and all the lights are builded.
But as soon as we close and restart the editor, the previous building is not saved and the message “lighting need to be rebuilt” reappears.
We tried a lot of things but nothing seems to fix this.
Is it a 4.12 bug or are we missing a step?