On the Bootstrap documentation page for buttons found at this link, there is an issue with toggling adjacent buttons where the box-shadow overlaps from one button to another.
https://i.sstatic.net/p8FKd.png
The CSS code for the box shadow on each button is:
box-shadow: 0 0 0 0.2rem rgba(134,142,150,.5)
Is there a solution to prevent this issue? It appears broken, especially when more than two buttons are placed adjacently.