Inventory full behavior improvement

Hello, i'm not sure this is the right section for this but the posts and the lack of other Feedback sections seems to suggest so.

I said improvement but the only games i saw this behavior from inventories is on games that were rated bad on their respective platforms.

What am i talking about? The fact that it's impossible to accept quest rewards or gather items that we have an unfinished stack of in the inventory while there is no free slot available.

An example : get an animal hide and an HQ animal hide in your inventory, fill all the other slots with different items, then try to complete a retainer hunting quest where the reward is animal hide. It will not let you do that. Same situation when gathering.

Although i CAN buy more of an item from a merchant even if the inventory is full.

Why is this different? I don't know, but when i posted this suggestion to the bug section, it was moved to "Working as intended". I'd say rather than the UX design is flawed or rushed.