Points disappearing if coordinate point placed before resource point

[itspangler]

I just started seeing a bug where coordinate points disappear if you place them before image/resource points., e.g., in the GIF below, I place geographic coordinate #6 before placing pixel coordinate #6, and it disappears, throwing variations of this error:

Uncaught Error: Cannot read properties of undefined (reading '0')
    at v (connection.js:264:13)
    at g.handleMessage (connection.js:192:11)
    at e.onmessage (connection.js:143:18)
    at WebSocket._handleMessage (reconnecting-websocket-mjs.js:172:23)

[bertspaan]

What's the URL of the IIIF resource where this is happening?

[itspangler]

Here's the manifest where I first noticed it: https://www.digitalcommonwealth.org/search/commonwealth:7s75h3704/manifest

As far as I can tell, though, it's happening globally; here's a few other maps where I tested it and experienced the same behavior:

• Library of Congress
• LMEC
• Rumsey