Swapping sprites with sprite resolver

Perhaps you have “Write Defaults” checked in the animation state?

NOTE: If you animate what Sprite is shown that will overwrite stuff you do in code, unless you put your overwrite code in LateUpdate(). Here’s why:

Meanwhile, here’s just general animation stuff to note:

Anything with Animations / Animators / Mechanim:

Only consider the code AFTER you have done this critical step:

Always start with the Animator state machine and prove it works in isolation, no code at all.

Here’s more reading: