The team has reproduced this and opened bug for fix. Updates will be shared on this post. Sincere apologies for any inconvenience.
Adobe XDjoachim supported this idea ·joachim commented
It's the same with the June-release of XD.
The zoom tool works.
The command +/- doesn't work on the numberpad.
In the attached video i'm using command +/- on the left side of the keyboard first (works), then i use command +/- on the numberpad (does NOT work), as you can see, when using the +/- on the numberpad, the object-menu gets highlighted for some reason.
Please fix this obvious bug soon...