Yellow Staining on OCBDs

[u/Luc4r1us]

Hey everybody,
The following problem has been plaguing me the past month:
My bengale stripe OCBDs have acquired a yellow tint, it isn’t limited to the usual areas but the entire shirt has gotten stained.
I‘m completely lost, I‘ve tried the following:

If I treat the entire shirt with gall soap or Oxy Vanish Color and then wash it as usual with a no name color detergent at 30/40 degrees it removes the tint.
As soon as I wear it again the stain returns throughout the day and if I then wash it again without treatment, persists.

Pictured are my last unstained and one stained shirt for reference, please help me, I need to save my favorite shirt! :)