i can't believe no one has complained about this! It's really just the one Philadelphia (!) city commissioner, who's been writing about it since 2012.
TL/DR Apparently the drivers license process finally was changed in September 2017, so it won't be a problem going forward. And the commissioner says it only involves about 100,000 people, less than 1% of registered PA voters, some of whom may actually be citizens. But in special elections it could definitely be an issue.
I guess the Republicans thought it was too piddly a number to worry about?!