Response Preview Pane Issues in Windows

The response view pane doesn’t display “body” or “header” tabs correctly, shows strangely-rendered empty text areas:

I know it’s not a problem with my API because if I switch to the “preview” display, it shows the response body:

I’m using Windows 10, 64-bit - any ideas on things I can try to fix this? As is, I can’t use the ctrl+k shortcut for verification snippets, bummer.