Select backfaces in weight painting mode in 2.8?

So I think I’ve found a bug. Enabling X-Ray doesn’t allow me to select backfaces in this mode as far as I can see, am I missing something?

If someone else can confirm the same then I’ll file a bug if there isn’t already one by that time.

EDIT: having X-ray mode at .999 solved it so I can see the weights and select through at the same time.