diff --git a/src/xrt/state_trackers/oxr/oxr_instance.c b/src/xrt/state_trackers/oxr/oxr_instance.c
index e7a963e72..46259e591 100644
--- a/src/xrt/state_trackers/oxr/oxr_instance.c
+++ b/src/xrt/state_trackers/oxr/oxr_instance.c
@@ -167,15 +167,14 @@ detect_engine(struct oxr_logger *log, struct oxr_instance *inst, const XrInstanc
 static void
 apply_quirks(struct oxr_logger *log, struct oxr_instance *inst)
 {
-#if 0
-	// This is no longer needed.
+	inst->quirks.skip_end_session = false;
+	inst->quirks.disable_vulkan_format_depth_stencil = false;
+
 	if (starts_with("UnrealEngine", inst->appinfo.detected.engine.name) && //
 	    inst->appinfo.detected.engine.major == 4 &&                        //
-	    inst->appinfo.detected.engine.minor <= 27 &&                       //
-	    inst->appinfo.detected.engine.patch <= 0) {
-		inst->quirks.disable_vulkan_format_depth_stencil = true;
+	    inst->appinfo.detected.engine.minor <= 27) {
+		inst->quirks.skip_end_session = true;
 	}
-#endif
 }
 
 XrResult
diff --git a/src/xrt/state_trackers/oxr/oxr_objects.h b/src/xrt/state_trackers/oxr/oxr_objects.h
index 689537ac2..ebd62e579 100644
--- a/src/xrt/state_trackers/oxr/oxr_objects.h
+++ b/src/xrt/state_trackers/oxr/oxr_objects.h
@@ -1509,6 +1509,8 @@ struct oxr_instance
 	{
 		//! Unreal has a bug in the VulkanRHI backend.
 		bool disable_vulkan_format_depth_stencil;
+		//! Unreal 4 has a bug calling xrEndSession; the function should just exit
+		bool skip_end_session;
 	} quirks;
 
 	//! Debug messengers
diff --git a/src/xrt/state_trackers/oxr/oxr_session.c b/src/xrt/state_trackers/oxr/oxr_session.c
index e0b0ef3f9..a9356a3cc 100644
--- a/src/xrt/state_trackers/oxr/oxr_session.c
+++ b/src/xrt/state_trackers/oxr/oxr_session.c
@@ -164,6 +164,11 @@ oxr_session_begin(struct oxr_logger *log, struct oxr_session *sess, const XrSess
 XrResult
 oxr_session_end(struct oxr_logger *log, struct oxr_session *sess)
 {
+	// there is a bug in Unreal 4 where calling this function will result in a crash, so skip it.
+	if (sess->sys->inst->quirks.skip_end_session) {
+		return XR_SUCCESS;
+	}
+
 	struct xrt_compositor *xc = sess->compositor;
 
 	if (!is_running(sess)) {