Rectal problem. Further surgery needed?

In 2017 had blood mixed with mucus with stool,in 2018 diagnosed as SRUS,apc done manometery- weak squeeze pressur defecography report is suggestive of rectoanal intussusception,surgery(STARR)planned,but later plan cancelled and told to do biofeedback,also tried but no improvement,then planned for rectopexy but also not done then colon transit study showed slow colon transit(colonic inertia)and then finally surgery for that(subtotal colectomy)just want to know whether intussusception will heal on it's own because doc said if constipation is reduced then hopefully there will be no straining and intussusception will not cause bleeding from or much problems.Is he correct or hiding something?but I feel intussusception is causing problem while passing motion because I feel heaviness in lower abdomen feel just motion will come out but it anus closes and nothing comes out at that moment and again after few minutes,it will come out,Is it due to intussusception?is further surgery needed?plz tell