Amberside said:

Hi guys, 

I want to report a bug - I'm using fully ascended Chevalier (equipped with Relentless set) and I've played around 50 games now and never once seen him do more than 2 hits using A1 ability even though it says 20% chance to repeat the ability. 

Hello Amberside,

Ty i will send your feedback to our support for check this situation, but remember 20% it's a very low chance.

if you need we are always here for help you.

Have a nice day

I had thought the same thing but it turns out there's just no extra animation for the extra hits. You have to look closely and you'll see extra damage numbers appear. With relentless you should see an extra 18% to get an extra attack though. Is that happening for you and do you find it worthwhile?