Not able to sprint as a Hero

@MrFa1nt 

Is this still happening? 

Try right-clicking on the game in Origin and select "Repair." 

Do you run any overlays while playing at all? 

I've noticed this issue also (on PC).  However, only as Anakin.  Plus, I'm able to sprint again after respawning.

This a very old BUG, but a very rare BUG too. I have had it a few times in the past, but for a good while I didn't trigger it. I have no idea what triggers this, but one thing which is very weird is that it persists between matches (not sure if map changes too). I remember testing this in HvV when I got it with Han Solo on Takodana more then a year ago, and when the match ended and we got to play DS on Takodana, I still had this BUG affecting me. Unfortunately I don't remember if going back to menu and trying to play a new game fixed it, or if I had to reset the application entirely.

And no, it isn't that sharpshooter lingering BUG that seems to have been fixed in one of the recent patches. Also, it isn't that running slow BUG caused by Palpatine's Dark Aura. It's a BUG where you simply can't run, the character will always walk. It's very easy to spot it if you continuosly press the forward button (or push the controller's stick repeatedly) as in any platform a double tap to go forward triggers the sprint movement. However, when you get this BUG, the character walks weirdly by continuously tapping the forward button as it never enters sprint mode. He seems to slide forward slowly as his feet continuously enter the beginning of the walking animation.

I have footage of that, I just don't have the time to search for it now. I'll bring it here as soon as I get it.

I'll copy my answer on the other report as I promised I'd bring it here (https://answers.ea.com/t5/Bug-Reports/Sprint-bug/m-p/8047624/highlight/false#M24453):

Ok so I finally found them:

It's hard to show a BUG where a command isn't processed because we can't show the buttons being pushed. However, as I stated before, double tapping the forward button (or double tapping up in the analog stick for consoles) automatically puts you in sprint mode, but when you're affected by the sprint BUG you enter this weird movement effect where you retrigger the beginning of the walking animation for each time you tap the forward button again. You can see I was "walking" (I was actually using the shift button to sprint to no avail), and then I started to tap the button and this visual effect took place.

I also managed to do this on another match:

In this same match I died and respawned as another character, and the BUG persisted:

Unfortunately I didn't find any recording of this BUG persisting between matches, but I remember this was a thing. As this is a very rare BUG, at least to me, I have no idea what triggers it, nor any method to stop the BUG from affecting you.

I have a sprint bug as Grievous sometimes.

With the difference that there are no weird run/walk animation fragments, the sprint animation and function just doesn't commence at all.

Even after getting killed and respawning, I'm still unable to sprint as Grievous then.

@TRlALON 
This is exactly the BUG I mentioned above, glad I'm not the only one who spotted it. The weird animation you can see in my gifs is tapping the forward button while being affected by that BUG. If you're not with this BUG, tapping the forward button makes you sprint, so this is the best way I can show this BUG graphically, because simply walking isn't much of a proof by itself. I'd have to discover a way to record my keyboard pressing keys and even then this isn't as strong evidence as showing this quirk which is only possible if the BUG is active.

And yes, it remains as you respawn, even if you respawn as a different character.

But tell me, you said it's somewhat common with Grievous for you, do you have any idea what might be involved in causing this issue with him? Some pattern? I still have no clue how this BUG happens, and it's so rare to me, I think it doesn't happen to me for half a year already.