One Valorant scenario a day. Make the call, then see if you were right.
Where does Chamber reposition to after planting the spike?
After planting the spike at [0:34], s0m (the chamber) opts to go to elbow, and clear flank while wrapping A short.
The spike is planted optimally for multiple possible post plant positions. The spike is visible from CT, from A short and from elbow.
Pros will rarely stay stationary in a 1vX situation where the enemy positions are unknown. By walking and clearing different possible angles, this reduces the number of unknown locations the enemy can be.
In this case, walking elbow allows s0m to clear out elbow, A main flank, and potentially A link as well.