Wheel steering is temporarily disabled when updating suspension strength
Updating suspension strength from a programmable block renders steering unusable for a few ticks. (I don't know about updating it from the in game menu because I haven't been able to test).
Updating suspension strength EVERY tick makes the steering completely unusable.
Updating suspension strength every 10 ticks makes the steering work for only 2-3 ticks at a time intermittently and inconsistently.
Also, spamming A and D seems to make the situation better(when updating every 10 ticks).
More specifically, updating suspension strength seems to make the game forget that you have the button pressed.