wizards and their grimoire

https://imgur.com/a/9jZUY

https://imgur.com/a/gHeh8

While I made looked at the image of my last post, I realized that the wizard holds the rod and the grimoire in the same hand.

I looked at the inventory screen and the wizard had only the rod and no grimoire was visible. I clicked on the sabres to look at the char with her weapons drawn and now she holds the rod in one hand and the grimoire in the other hand. The grimoire is also partly inside of her. Then I returned to the game and now she does not have a grimoire. Then I went back to the inventory and now she does not have a grimoire too.

In the inventory when the grimoire is not there while your weapons are drawn, when you equip a different grimoire the grimoire will suddenly be visible.

It looks like the grimoire is never visible in the inventory if the weapons are not drawn.

In the inventory with weapons drawn, usually you can see it only with a 1h weapon equipped or when unarmed. You cannot see it when equipping a 2h weapon or dual wielding. But the rod is a 2h weapon and you can see it. (BTW whats the difference between rods, sceptres and wands that some are 1h and some are 2h?)

In general, it seems very inconsistent if the grimoire is visible or not.

expected behavior:

It should be more consistent if the grimoire is visible or not.