Click-drag to select cells in Numbers doesn't seem to work

[TheUKDave]

This is a bit of an odd one, I've been using Barrier between my Windows and Mac for months, and generally it works great. But I've discovered that when using Apple Numbers, I can't click-drag to select multiple cells - what happens is that only the cell I land on is selected. It's as if I had dragged from the first cell to the last cell, and then immediately clicked the left mouse again after letting it go. When I plug my mouse directly into the mac and do the same thing, it works as expected to select the range.

This is not the case (as far as I've noticed) in any other application. I'm able to drag-select text, or draw, or whatever, in any other application just fine, it's only in Numbers that the dragging doesn't work as it should. To be clear, the cells do highlight as I drag, it's just that the selection goes away and I land just on the last cell in the range I selected.

Has anyone experienced this, or have any idea what I could do to try and fix it?