fix(core): Don't use data-swiper-slide-index for realIndex when virtual module is enabled (#8142)

Author: nWacky

src/core/update/updateActiveIndex.mjs

@@ -83,8 +83,12 @@ export default function updateActiveIndex(newActiveIndex) {
 
   // Get real index
   let realIndex;
-  if (swiper.virtual && params.virtual.enabled && params.loop) {
-    realIndex = getVirtualRealIndex(activeIndex);
+  if (swiper.virtual && params.virtual.enabled) {
+    if (params.loop) {
+      realIndex = getVirtualRealIndex(activeIndex);
+    } else {
+      realIndex = activeIndex;
+    }
   } else if (gridEnabled) {
     const firstSlideInColumn = swiper.slides.find((slideEl) => slideEl.column === activeIndex);
     let activeSlideIndex = parseInt(firstSlideInColumn.getAttribute('data-swiper-slide-index'), 10);