Sep 26 2020 07:10 AM - edited Sep 26 2020 07:13 AM
There is a bug when using Vertical tabs and Tab groups in Edge Dev Version 87.0.644.4
that orange tab group doesn't belong to the new tabs, it belongs to the first few tabs. as you can see in the screenshot below. the orange tab group indicator stays on its place even when you scroll down through your open tabs in the vertical tabs sidebar.