Weird artifact with MetroTabControl

[TheMeq]

There is a weird gray bar appearing in the top left of my tab control, Not sure why it is there, what it is, or how to switch it off. When the corner is hovered over during runtime, it turns black, and the whole thing disappeares after clicking it. Any ideas how to get rid of this?

[evilhawk00]

Same problem here, found https://stackoverflow.com/questions/36406756/datagridview-strange-layout-in-upper-left-corner the BringToFront() works for me.

[xchaosmods]

Change horizontal and vertical scrollbar width properties to 0

[hg9x]

Thanks evilhawk00