Either something bent through impact? which may cause the car to pull to one side as youre driving?
The tracking been adjusted on one side only instead of equally both sides.
A new track rod end has been fitted, and its position just guessed.
Whoever did it, if its through adjustment/new part fitting, hasnt got a clue how to do the job correctly, and you cant tell me they didnt notice on a test drive.
With the steering wheel not horizontal in the straight ahead position also can affect the indicator cancelling function too, and taking the wheel off and putting it on straight is not the right solution either unless someone has taken the wheel off and not put in on straight of course, that you wont know unless you have it all tracked with alignment equipment, which you should do.