Resource Odd Behavior

I'm just starting out on rewriting a program into .NET 6 using VS2022. Some parts I want to keep the same, including some background images used on the main form. I was a bit surprised to see that resources are managed via the Resources.resx file, now, rather than in Project | Properties. That surprised me largely because you can still get there from Project | Properties, so I'm not sure why it was changed. Seems like more of an annoyance than a benefit, but that's not the point of this question.

To add a resource, I click on the Resources.resx file...which then does nothing for just long enough that I assume that nothing is ever going to happen, after which, if I haven't shut the thing down...up pops the same resource manager I'm familiar with. That makes it even more bizarre that they moved it out of Project | Properties, but whatever.

I then try to add a resource. In this case, I have a series of BMP and JPG images to add, so I try to add an image. At that point, a sub-menu comes up that shows different image file formats, including BMP and JPG. Can't DO anything with that sub-menu, though, because moving the mouse over the sub-menu even a little bit, causes the highlight to jitter back and forth from one menu item to the next in a spastic fashion. If I leave the mouse alone...well, then NONE of the menu items are ever highlighted.

Are other people seeing this? I ended up just adding a file, which contain images, but adding images just seems to be broken.

I've not tried to do that before but yes, I'm seeing similar behaviour with the menu. Seems to be just one of the things that hasn't been reimplemented properly yet. Probably ought to log the issue with Microsoft. In the meantime, I was able to use the keyboard to navigate the menu without issue. I double-clicked on Resources.resx in the Solution Explorer without issue, although I had to click Show All Files to see it. You can still get to the resources using the project properties for now, but they will presumably be removing that in the future. Once there, I clicked on the down-arrow on the Add Resource button to show the menu, then used the down- and right-arrow keys to navigate the menu and the Enter key to select the final option.

No mouse??? Sacrilege!!!