Script element reverts to general text

Hi, I’ve created a new script style and created new elements in it over time. I just created a new element called ‘Reference’ under this style and then resaved the style. I set some text to this format, but when I reopen my document later, all the text set to ‘Reference’ has reverted to ‘General Text’.

How do I get Scrivener to remember to apply this style? I recall having this problem before and working around it, but can’t remember how i did it.