Fix transition animation for `.progress-stack`

diff --git a/scss/_progress.scss b/scss/_progress.scss
index 732365c5265531d3dec37450b7ea1641bcb3f764..8d0cb1f78ec0b582b6474fa8eef7c925b209530b 100644 (file)
--- a/scss/_progress.scss
+++ b/scss/_progress.scss
@@ -49,6 +49,7 @@
 
 .progress-stacked > .progress {
   overflow: visible;
+  @include transition(var(--#{$prefix}progress-bar-transition));
 }
 
 .progress-stacked > .progress > .progress-bar {