how do you re-do failed puzzles?
✔=re-submitted 01/09/21: Failed puzzles can only be re-done one time in learning mode

I am using Learning right now...
Was it during the same session ?
- Yes. Same session.
If you try again the next day you might bump again into the same puzzle...
- Shouldn't matter. I should be able to re-do them as mny times as I want on the same day, different days, etc...

...a brief addendum...
This is not specific to the "windmill" theme. Had the same issue(s) with "perpet", "stalemate", "interference", etc.

JD - Can you give us an ETA on this and the other learning mode bugs?
FYI, these bugs are not exclusive to BETA. I encounter the same issues outside of BETA too.
Thanks.
1) On https://www.chess.com/stats/puzzles/username, hovering over the windmill theme:
...shows 1 puzzle failed (how that equals a score 8% is another topic)
2) at https://www.chess.com/puzzles/learning, select "windmill", "problems I have failed", and rating range of "1-3000":
3) did the puzzle, correctly this time:
So far so good.
4) Now go back to https://www.chess.com/puzzles/learning, and refresh the page. All settings remain the same (see #2 above), but when I click on "start":
It seems that I am only able to re-do that failed puzzle one time.
Fix: Users should not be limited to re-doing a failed puzzle only one time, and should be able to re-do failed puzzles as many times as wanted/needed.