I use Vivaldi on Windows with the Dvorak layout. I am using the Windows keyboard layout changer so that guests on my machine can use QWERTY, if necessary. When in Dvorak, the CTRL-comma ("w" key in QWERTY) triggers a closing tab and ALT -> comma triggers the opening of the "Window" submenu of the main menu. Apparently, in Vivaldi the "w" key is not being remapped to the period key in QWERTY. I can only confirm that this happens with the "w" key. Ctrl-T works as expected, as do Ctrl-C and Ctrl-V and Ctrl-P. However, Alt-V fails to open the "View" submenu of the main menu. I assure the reader that the OS is interpreting all of the keys properly (as I'm typing this in Dvorak, currently). Also, Ctrl-W works fine in Chrome, just not in Vivaldi. I'm not sure what's happening. But, I've reported the issue. I've done my part.
I've reported the issue. I've done my part.
Have you already reported it via the Bug Wizard too?
You haven't told us your Vivaldi version or your Windows version.