Login on Android Chrome with github auth

[tgrrr]

When I try to login with the signin with slack button, I get correctly redirected to github, authorised, and then see a screen that reads

Login completed. Click here to close this window.

Url: https://codebuddies.org/_oauth/github?code=`&state=`

Note: <hash string>'s are removed

• I then click the link, it doesnt close that window.

• I refresh/navigate on another browser tab, and am still not logged in.

• Tested with/without GitHub logged in on another tab

• I've tested with/without fasthub handling git links.

• It works correctly on Firefox android.

• It works on Chrome desktop

• I use 2fa on github

• I have cleared cookies, etc

Chrome v 76.0.3809.111
Android 9, Oxygen v9.0.7 Oneplus 6
Fastdroid 4.6.7

[lpatmo]

Possibly related:

The first night, folks were having trouble logging in, and logged-in users were having trouble scheduling hangouts. Console errors looked like this:

The next night, a little less than 24 hours after #1137 was merged in, everything worked again.

Similar console errors: