This seems to be fixed in 0.16.30

It also happened with pipes, but I haven't done any significant analysis of other objects.

GeForce GTX 660. It's an older card, but it checks out (only used that for the star wars line, I haven't actually looked if there's something wrong with the card - though this is new behavior for Factorio on my system).

MORE follow up: 12 rendered as '1' so I think it's the 2 that's the problem.

A follow up: I think any number in the 20s has this problem. Bumped into it with pipes too.

I was crafting pumpjacks manually for my oilfields and I think when it hit 20 (not sure of the exact number), I got a 0 in my taskbar for the quantity I had.
No mods.

I'm red/green colorblind, and the boxes that represent the roboport active area (red) and movable area (green) are difficult to differentiate. Is there a way to modify the colors so it's more obvious? Thanks.