AIS turns hydrogen tanks into cargo containers. This cannot be undone by disabling AIS mod. This appears to be permanent and you will have to grind down and rebuild all your Hydrogen tanks even after mod is removed.

I don’t know the ramifications of being able to store any items in your hydrogen tanks. It might not mater, but this may affect hydrogen storage amounts. Hopefully we could get this fixed soon. I’d hate to have to rebuild all my tanks.