I went through my entire raid log from last night, and it was every boss except blackhand, and could not find a single occurrence that this is happened. Every crusader strike I casted, and did not get parried, gave me holy power.
I'd be interested in seeing a log from the OP, or even a screenshot of the GM confirmation. Until then I just have never experienced such a thing.
Iron maidens is a prime example for me:
https://www.warcraftlogs.com/reports...t=36&spell=109
https://www.warcraftlogs.com/reports...rce=2&fight=36
The first link shows how many crusader strikes gave me holy power, second link shows how many times I used it throughout the fight. Pretty much the same case for every fight last night, and that's a lot of crusader strikes over the entire night. Not saying the OP is wrong or anything, but it's a bug I clearly haven't experienced, and would like to know more and see logs of such an occurrence for sure.