Report ID: 1958662270
Chrome version: 86.0.4240.75
Zotero connector version: 5.0.74
How to reproduce:
1. Navigate to https://medium.com/lightmatter/optical-components-for-matrix-processing-73687cdd7aa6
2. Right click & save to zotero (embedded metadata)
3. Then a new webpage appears in my zotero library as expected, but without any snapshot sub-item


Also, when looking into DevTools, it shows the following:

zotero.js:351 TypeError: Error in invocation of runtime.sendMessage(optional string extensionId, any message, optional object options, optional function responseCallback): Message length exceeded maximum allowed length.
at chrome-extension://ekhagklcjbdpajgpjgmbionohlpdbjgc/browser-polyfill.js:669
logError @ zotero.js:351

SingleFileZ is hooking the IntersectionObserver API to detect and load deferred images.
window.IntersectionObserver @ content-hooks-frames-web.js:300

Uncaught (in promise) TypeError: Error in invocation of runtime.sendMessage(optional string extensionId, any message, optional object options, optional function responseCallback): Message length exceeded maximum allowed length.
at browser-polyfill.js:669
at new Promise ()
at Proxy.asyncFunctionWrapper (browser-polyfill.js:668)
at Object.apply (browser-polyfill.js:696)
at Object.callMethodWithCookies (messaging_inject.js:76)
at Zotero.Translate.ItemSaver._executeSingleFile (translate_item.js:181)