5.2.1 appears to have hit the app store now. Observations:
At first it didn't appear to be fixed on the phone
, but after removing and re-installing it did. This isn't ideal (you lose settings, etc and will have to restore them from backups), so I tried to avoid that on the iPad
On the iPad
installing the update also didn't immediately fix it, but after restarting the app a second time it's now showing properly.
Specific steps performed on iPad: 1) close app, 2) update and relaunch, 3) toggle WG and notice not updated, 4) clear cache, 5) toggle WG and notice not updated, 6) restart app and toggle WG; icons now displaying properly.