This bug removes the health boost effect here how the bug is removing the effect even with unlimited time if you have an health boost effect and a totem of undying can remove the health boost effect heres how the bug removes the effect: if you have the health boost effect with low hp (not full hp with health boost effect) and totem in undying in use and get hit by an mob the totem of undying saves you but removes the health boost effect (im sure this is also abug on java edition)