Slideshow fade no longer crossfades

[AstroTibs]

Operating System Info

Windows 11

Other OS

No response

OBS Studio Version

31.0.0

OBS Studio Version (Other)

No response

OBS Studio Log URL

https://obsproject.com/logs/R39wkUaav5BtuYIS

OBS Studio Crash Log URL

No response

Expected Behavior

Images involved in a slideshow should cross-fade between entries when the Transition:Fade option is chosen.

Current Behavior

Each image cuts to black and then fades in from black.

Steps to Reproduce

1. Create Image Slide Show source
2. Set Transition to "Fade"
3. Add images

Anything else we should know?

An older random slideshow source that I set months ago still crossfades properly. I do not want to touch it for fear it will break.
When I make a new slideshow that points to the folder of images used by that old slideshow, the new slideshow still does not work correctly, so it's not an issue with my choice of images.