Save session stays open after failed PDF download

[AbeJellinek]

Connector 5.0.144, Firefox 129.0.2
Example URL: https://link.springer.com/chapter/10.1007/978-3-319-23168-6_1

The PDF fails to download without institutional access, and no open-access PDFs are available. The connector continues making /connector/sessionProgress requests every two seconds for a couple minutes after the save progress window has disappeared. Zotero responds with { done: false }.

zotero(5)(+0000001): HTTP/1.0 200 OK
X-Zotero-Version: 7.0.4.SOURCE.051d3384c
X-Zotero-Connector-API-Version: 2
Content-Type: application/json

{"items":[{"id":"oxO3jSh1","title":"Parkinson’s Disease","itemType":"bookSection","attachments":[{"id":"5n1QTrDl_1","title":"Full Text PDF","contentType":"application/pdf","progress":false}],"progress":100}],"done":false}