Bundle in hotbar makes cursor move in inventory when pressing down on D-Pad or left stick

How to reproduce:

1. Put bundle in your hotbar.

2. Open inventory.

3. Scroll so the cursor is on the bundle.

4. Then input down-scroll once (normal scroll, not bundle scroll). (On switch: L-stick down)

Intended behavior:

Cursor stays on the cell with the bundle.

Bugged behavior:

Cursor will move to the right, differently depending on how many unique items are inside the bundle.

[Number of unique items: number of cells moved to the right]

u0: c0, u1: c5, u2:c4, u3:c3: u4:c2, u5:c2, u6:c2, u7:c3, u8:c2, u9+:c0.

Number of stacked items doesn't seem to matter, only number of unique items