Use the blueprint, deconstruction planner, import from string, upgrade planner, or blueprint book hotbar button while the player is in a space platform, then click the item onto my hotbar.
What happened?
The blueprint/planner/etc is placed into the player's inventory and is present in the inventory once the player drops to a planet
What did you expect to happen?
I expected to not be able to hold anything in my inventory while in a space platform since I cannot bring anything up with me or access my inventory while on the platform. IMO you should just allow blueprint books/planners as an exception to what you can carry on the rocket just like armor and weapons. If my Factorio engineer can fit 2 portable fission reactors in his armor and still get on the rocket, surely he can tuck a book of blueprints into his jacket
If you are going to patch it the other way so that you can't create blueprint books while in a platform can you wait until I finish my playthrough please? It's really annoying to be in a space platform and not be able to use my main blueprint book to do stuff remotely.
Does it happen always, once, or sometimes?
Happens always, I've only tested a couple times but the planner was always present in my inventory, and the planners can be used when you hold them like normal, even while in the space platform.