Second wind, retaliation, reuse interaction

Steps to replicate
1. Link second wind to divine retribution
2. Gladiator Measured Retaliation + no forgiveness
3. Use all cooldowns on second wind for divine retribution
4. Use 2nd retaliation skill until it makes the first one usable

The bug here is that it seems much less than 70%, almost as if measured retaliation or no forgiveness is being applied wrong. I've been playing for a while now and also counting them; it could be similar to the previous bug but happening only in the case of second wind?