[Website] 'Select Custom Sprite' option is not being remembered

[filistar]

Description:
When returning to any seed permalink after selecting the option "Select Custom Sprite", is causing the drop down to not remember previously selected option.

Steps to reproduce:

1. Open any permalink and select "Select Custom Sprite" in the "Play As" drop down.
2. Open any other permalink. "Play As" drop down is blank and console displays the next error: