So, using assault rifle slows me down to walking speed. Problem is, the slow down persists after stopping using it. Only way to restore my speed is to hit teleport.

Known bug? Or what?

Thanks

No one knows anything? I don't think i'm the only one who has experienced it

Well, I use a flying disc as a movement power on my Munitions Toon and I am not experiencing the slowdown you are seeing.

Maybe more people would chime in if you gave more details like:
What travel powers are you using
What advantages does your assault rifle power have
etc...

I have this problem off and on. Another way to fix it is to shoot something else (like a box) with a different power (like your energy builder).

When it happens, it is incredibly annoying. I usually have Acrobatics running when it occurs.

It happens to everyone I know. The fix is to use gatling gun instead. :P

This happens to me too . Briefly activating your travel powers or using a different power will return your movement speed to normal , but it'd be nice if the devs fixed this .

I agree. A minor annoyance that could be looked at. But yeah, I just click a travel power on and off when it happens.