This is because your rotation elements aren't part of your ScrollTrigger You'll want to either separate those into their own ScrollTriggers, or add this to your pin/scrub tween as a timeline like this:
gsap.timeline({
scrollTrigger: {
scroller: pageContainer, //locomotive-scroll
scrub: true,
trigger: "#sectionPin",
pin: true,
start: "top top",
end: pinWrapWidth,
markers: true,
},
defaults: {
ease: 'none'
}
})
.to(".pin-wrap", {
x: -horizontalScrollLength,
})
.to('.anuncio1', {
rotation: 360*5,
},0);