Link to the puzzle https://www.chess.com/puzzles/problem/1218867
Puzzle update: UI bug

I think you mean f3 not c3.. But still, does look like a bug...
Yes, thank you. I changed it. Should've payed more attention

Do you have Developer Options > Animator Duration Scale > Animation Off ?
If you do, there's a fix coming out soon for that.
This seems to happen randomly and I can't find any particular pattern in when it occurs, but after solving a lot of puzzles in a row, it becomes more and more frequent until you restart the app.
OS version: Android 13
Device: Samsung Galaxy s21
App version: 4.5.18 (beta tester)
In this first screenshot notice the black knight is obviously not centered on the square. (Took this screenshot after the computer made the next move, but it was like this the second I let go of the black knight)
Now you might look at this and think that's all, but the real bug is this: The knight isn't on that square!
Refer to the following screenshot showing the legal knight moves. The knight is d3 but it is showing the knight on f3.
Please let me know if there is anything else I can do to help. I know how annoying it is to test mobile bugs