Certain known words always show up yellow

Certain known words among my Chinese lingqs (ma5, le5, etc.) always show up yellow. If I mark them known while reading a specific text, they cease to be yellow for that session, but then pop up again as yellow in the next text, even though their status shows them as known (4). I have the same problem in Google Chrome, Mozilla Firefox and Internet Explorer. Has anyone else experienced this?

Sorry, I originally posted this as a comment to a lesson, and then realized it belonged in this forum. Thanks

Hi sprachenfreak,

This is a known issue. We hope to resolve it in the next week or so.

Thanks for the quick response Mark. Sorry, I didn’t realize it was a known issue. Your efforts are much appreciated. Cheers