Actually, the problem appears to be quite limited in scope. Yes, others have encountered the problem, but it tends to only be with NVIDIA Macs.
Prior to @stylesb pointing out his workaround, we had almost no clue what was causing it, because we don't do anything particularly special with the labels in the application. We basically used a standard implementation, so there wasn't anything clearly obvious to us that needed to be tested to attempt to change the result.
We have some ideas on how to address it, and the dev team is actively looking into it. If we have a potential cause, we can recreate it, and it's on our radar already (it is), then it is bound to be fixed in a coming update