Noticed a slight visual issue in the game’s lobby when you have character on both Live and PTR servers. This is not an exploit, just something that should probably get fixed at some point.
The region dropdown sums up all the characters on that region, regardless of the build (PTR or Live). Note: only happens on the dropdown entries, not on the dropdown element itself.
Reproduction steps: create a character on PTR, then create one on Live, and you will notice the dropdown will show 2/x for that region. Attaching a screenshot below: