The bug is as follows:

When you try to blink while swapping weapons, you will simply do a normal jump and nothing happens.

The timing for it to bug out has to be rather specific however: When the animation to pull out your second weapon starts, and you blink while it gets pulled up, exactly after your first weapon gets stowed, you will fail to perform a blink.

I can reproduce this with a 90% succes rate. It only happens during this animation. You can blink before your weapon is stowed, and after the other weapon got pulled out.

On a sidenote: Astrocyte Verse does not seem to increase horizontal distance, just vertical distance, which seems pointless. If I'd want that, I could simply spec into mobility.

It also doesn't shorten the recovery time to draw weapons after blink, which again, seems weird, given the description of the exotic. And since Blink is totally unviable without the helmet, I am slightly confused as to why the helmet doesn't even do, what it says.

Edit: Tagging /u/Cozmo23 and /u/dmg04

Edit 2: Pwadigy talked about another bug, making it impossible to slide after using 3 blinks. (Blink 2 times, wait for 1 blink to recover, and blink as soon as possible again).

Yet another user, Xaolin99, talks about a blink bug directly after stopping to sprint. I have to test those once I am at home.