IE does not support document.contains

src/ol/PluggableMap.js

@@ -1007,14 +1007,16 @@ class PluggableMap extends BaseObject {
               originalEvent.clientY
             );
       if (
+        // Abort if the target is a child of the container for elements whose events are not meant
+        // to be handled by map interactions.
+        this.overlayContainerStopEvent_.contains(target) ||
         // Abort if the event target is a child of the container that is no longer in the page.
         // It's possible for the target to no longer be in the page if it has been removed in an
         // event listener, this might happen in a Control that recreates it's content based on
         // user interaction either manually or via a render in something like https://reactjs.org/
-        !rootNode.contains(target) ||
-        // Abort if the target is a child of the container for elements whose events are not meant
-        // to be handled by map interactions.
-        this.overlayContainerStopEvent_.contains(target)
+        !(rootNode === document ? document.documentElement : rootNode).contains(
+          target
+        )
       ) {
         return;
       }