Receiving ERR_BLOCKED_BY_RESPONSE for microsoft endpoint in Microsoft SharePoint mobile app

[jjibson-lucid]

What type of issue is this?

Question

What SharePoint development model, framework, SDK or API is this about?

💥 SharePoint Framework

Target SharePoint environment

SharePoint Online

What browser(s) / client(s) have you tested

• 💥 Internet Explorer
• 💥 Microsoft Edge
• 💥 Google Chrome
• 💥 FireFox
• 💥 Safari
• mobile (iOS/iPadOS)
• mobile (Android)
• not applicable
• other (enter in the "Additional environment details" area below)

Additional environment details

SPFx v1.13.1

Issue description

When using the currently in-development integration between Lucidchart and SharePoint, everything works fine for all browsers we've tested. However, when trying to use the mobile application for SharePoint we only get the following error:

Full Error:

The webpage at 
https://login.microsoftonline.com/3ab1a6e2-3a47-47c2-af6f-dd4d12a95a02/oauth2/authorize?client_id=00000003-0000-0ff1-ce00-000000000000&response_mode=form_post&protectedtoken=true&response_type=code%20id_token&resource=00000003-0000-0ff1-ce00-000000000000&scope=openid&nonce=2D7ECF8E4DC1E4B3BBE7B02FD97CA731CA7E9B7347073506-3924AF81FED99E34167AFE56CE0CEF52DDCC26B52F2C3EB94E2DA5B85518D821&redirect_uri=https%3A%2F%2Fluciddev-appc5589ddae06948368f53470a1d06d6ee.sharepoint.com%2F_forms%2Fdefault.aspx&state=OD0w&claims=%7B%22id_token%22%3A%7B%22xms_cc%22%3A%7B%22values%22%3A%5B%22CP1%22%5D%7D%7D%7D&wsucxt=1&cobrandid=11bd8083-87e0-41b5-bb78-0bc43c8a8e8a&client-request-id=183538a0-70c8-1000-af30-714cb83b43e7&popupui=1 could not be loaded because:
net::ERR_BLOCKED_BY_RESPONSE

This is what we get in a browser:

Do you happen to know why this might be happening? According to the error message it seems to be blocking an authentication attempt to a Microsoft endpoint, but it's unclear why this would be occurring.

Thank you for reporting this issue. We will be triaging your incoming issue as soon as possible.

Thank you for your submission. As explained in our wiki (Issue List: What doesn't belong in the issue list), this issue list is for SharePoint developer/development issues. All capability question/discussion questions, or topics related to SharePoint administration & end-user topics should be reported through the support user interface available in the tenant admin settings. You can also have a discussion and ask questions at the SharePoint TechCommunity forum. You can learn more about this in our wiki: type:invalid-not-dev-issue