Welcome to the forum.
Having another distraction for the immune system to attack does not reset or stop the UC attack, to the best of my knowledge. The immune system is quite capable of attacking multiple, independent areas of the body at-a-time.
The only thing that comes to mind, on your sort of thinking, is Qu Biologics SSI treatment that is currently udergoing clinical trials (where they are essenially trying to reset the UC-immune-attack; pretty novel):
www.qubiologics.com/what-we-do/how-ssis-work/