Bug in the proc description differs

Can you please clarify what exactly is the correct proc bonuses for the crafted DEX helm?

The Mythic's Swift Leather Hood

Attachment 250927

Is it :+50% movement speed (stacks with other speed buffs) for 5 seconds with a 10 second cool down?

Or

Attachment 250928

Is it :
100% stacking speed buff?

+50% speed (stacking) is correct. I'll get the text updated.

Thank you Futumsh