According to your testing, does the issue occur with ONLY MiniScaled mod and Immersive Portals mod and Farbic API?
No
Describe the issue
When playing as a Phantom in the Origins mod, being in phantom mode will make you fall through the box's floor, even if you add the 'unphaseable' tag to mini_scaled:barrier with a datapack.
Placing a layer of normal blocks inside the box prevents this.
According to your testing, does the issue occur with ONLY MiniScaled mod and Immersive Portals mod and Farbic API?
No
Describe the issue
When playing as a Phantom in the Origins mod, being in phantom mode will make you fall through the box's floor, even if you add the 'unphaseable' tag to mini_scaled:barrier with a datapack. Placing a layer of normal blocks inside the box prevents this.
Post the log here