Dropped items are doubled in Creative, Survival inventory

If you get any item and press q on the item IN The Survival Inventory, you get 2 items instead, repeat this again and again till your inventory is empty then right click on the ground to get that item.
I found out the rightclick thing when i was interacting with a sign.and i got that item on my inventory.

Here is a video about this issue, it has no sound.
https://youtu.be/466xrtFE1w8