lms-viahtml.hypothes.is and NPR website giving error

## Bug report form
### Steps to reproduce
1. In **Chrome**, log in as teacher or student here https://hypothesis.instructure.com/courses/326/assignments/3747 (jeremydean+teacher@hypothes.is, jeremydean+student2@hypothes.is)
2. See error - **this error only occurs when opening the assignment in a new window**
3. In another browser (we've seen Success in Safari, Firefox, Edge) do Step 1 again
4. See successful launch.

### Expected behaviour
The non-Chrome behavior is expected; NPR site launches in Via.

### Actual behaviour
In Chrome you get this error:

Hypothesis debug info
frontend_apps.bundle.js?642d0c:6 Application Instance ID: 1176
frontend_apps.bundle.js?642d0c:6 LTI version: LTI-1p0
frontend_apps.bundle.js?642d0c:6 Organization ID: us.lms.org.x9L8IC7tRRa2-rYITOx_yQ
chrome-error://chromewebdata/:1 Failed to load resource: the server responded with a status of 504 ()
chrome-error://chromewebdata/:1 Refused to display 'https://lms-viahtml.hypothes.is/' in a frame because it set 'X-Frame-Options' to 'sameorigin'.
VM49123:6792 crbug/1173575, non-JS module files deprecated.
(anonymous) @ VM49123:6792

HAR file from failed launch: https://drive.google.com/file/d/1gfVa_tg-WP5bAg95AnSdomu0PSoCfCaS/view?usp=sharing

### Browser/system information
Chrome 107
macOS Big Sur 11.6.5

### Additional details
Slack thread: https://hypothes-is.slack.com/archives/C4K6M7P5E/p1668192765500939
Site used in assignment: https://www.npr.org/transcripts/1098166279