Sometimes using Rogues's "Cunning Action" consumes the normal action, not the bonus

Level 8
Kickstarter Backer
2 years ago

It can't just be me that's noticed this right? I thought at first this was my imagination, and I just kept accidentally clicking my main action to disengage. 

But now I think I wasn't being clumsy after all. I was being extra careful, and I selected Cunning Action: Disengage, and did that and moved, but it consumed my full action instead of the bonus action. It doesn't happen consistently - I reloaded the battle and tried again and this time it worked properly - but I'm sure that someone else must have had this happen to them as well.