I'm not sure if I'm experiencing a similar or the same problem with Pathfinder and QRZ.com. Nothing is locking up, but I can no longer see the complete biography. Clearly, something has changed at QRZ.com.
When I look at any page in Pathfinder/QRZ, there appears to be a split screen, with the biography part in the top. There is no scroll bar on the right to let you see the rest of the page - only the first few lines are visible.
I'm using W10, Microsoft Edge 41.16299.248.0 Microsoft EdgeHTML 16.16299
These pages were displaying correctly (no split screen) during the day on 3/21/2018.