I use the option to shift into travel form or cat form depending on indoors/outdoors, but it no longer works in combat. Is this something that can be fixed, or something that was changed on Blizzard's end?

You need to have traveltotravel enabled. However, I will look at the code and see if there is a way to do this while still maintaining integrity of the code.

You need to have traveltotravel enabled.

Do you mean the option for "Druid: When in combat, shift from Travel or Aquatic form directly back to that form"? I do have that enabled.

The only class option that I do not have enabled is "Druid: Prioritize using Flight Form over a regular mount even when not moving."

I tested this with a dummy in IF, and it does set the right form. I will do some more testing.