Unlucky or bug?

Tried further enhancing my sword today. It already had 3 stars on it.
4th success with AEE is supposedly 70%.

Tried 4 Untradeable AEE (from the Eregos event and possibly other event rewards), all failed.
Tried two normal AEE (from the box of tomorrow event, if it matters), both passed.

Obviously this is a tiny sample that means nothing at all.
However, I'd like to hear from someone who did pass an Untradeable AEE, just to be sure it's nothing but my bad scrolling luck at work.

Unlucky.

I've passed many untradeable AEE and we've talked about this before too.

Thank you.

Of the next 5 attempts (with untradeable AEE), 4 passed

Somewhat unrelated but I failed 3 90% potential scrolls in a row today. Shet happens I guess.