I ran into trouble trying to get the Twilight Princess 4K texture mod to work using my game save from my Wii. I pulled the ISO from the same Wii, and while the game would load fine with a new save, it would freeze on a black screen when trying to load into my imported save from the Wii after selecting it from the game's main menu. This occurs with both the standard texture mod and the post processing version.
So for anyone who encounters a similar issue, I right clicked my copy of twilight princess in the emulator, clicked properties, selected the Gecko Codes tab, and found that unchecking the "Remove Z Targeting Black Bars" line fixed the issue. I tried disabling every graphic related setting trying to isolate the issue after realizing my game save loaded just fine into Vanilla Dolphin. Saw someone in the discord having issues with a gecko cheat in another game on the discord and was relieved to find that fixed my issue.
I'm hoping to save someone else the time if they encounter the same loading bug.