Thanks for posting about this.
This is a known issue. When you right click for the context menu, the Designer focuses on whichever element you are hovered over at the time of the right click–not the selected element.
In this case, I built out the same structure you provided in your example. I had the
link block selected, but was hovering over the
Alternatively, if I hover over the
link block, that is the element the context menu will affect.
As a workaround for this you can use the shortcut CMD + Shift + A (Ctrl on windows) to create a new symbol
Here's a read only link of the site I tried to reproduce this behavior in: https://preview.webflow.com/preview/symbolic-aholic?preview=d8e44daa8ee735cbd09200c76af3dfbc
Here's a screen recording showing the behavior:
We are currently working on fixing this issue. Until then, the keyboard shortcut is the best way to create symbols.
I hope this helps to clarify!