Tumblr feeds are incorrect

[seadowg]

• I have checked the Common Problems page.
• I have searched the issue tracker for a bug that matches the one I want to file, without success.

Desktop (please complete the following information):

• OS: Mac
• Browser: Mac OS X build
• Version: v1.1.
• An example would be https://waneella.tumblr.com/

Describe the bug

Tumnblr feeds now seem to include an extra "..." item that is timestamped with when the feed was last checked for updates:

This item seems to link to https://.tumblr.com/post/. My guess is this is most likely because of a change in the Tumblr API response format. I'm also wondering if Fraidy Cat could avoid using the API and just use Tumblr blog RSS feeds instead (https://<user>.tumblr.com/rss).