--- old/src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MTLRenderQueue.m	2019-09-09 18:14:35.000000000 +0530
+++ new/src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MTLRenderQueue.m	2019-09-09 18:14:35.000000000 +0530
@@ -1080,7 +1080,16 @@
         RESET_PREVIOUS_OP();
         if (g_modifiedLayersCount != 0) {
             [mtlc endCommonRenderEncoder];
+            id<MTLCommandBuffer> offScreenCommandBuffer = mtlc.commandBuffer;
+            J2dTraceLn(J2D_TRACE_VERBOSE, "offScreenCommandBuffer commit");
+            [offScreenCommandBuffer commit];
+            if (sync) {
+                J2dTraceLn(J2D_TRACE_VERBOSE, "sync is true");
+                [offScreenCommandBuffer waitUntilCompleted];
+            }
+            [mtlc releaseCommandBuffer];
         }
+
         BMTLSDOps *dstOps = MTLRenderQueue_GetCurrentDestination();
         if (dstOps != NULL) {
             MTLSDOps *dstMTLOps = (MTLSDOps *)dstOps->privOps;
@@ -1088,6 +1097,7 @@
             if (layer != NULL) {
                 [JNFRunLoop performOnMainThreadWaiting:NO withBlock:^(){
                     AWT_ASSERT_APPKIT_THREAD;
+                    J2dTraceLn(J2D_TRACE_VERBOSE, "Before setNeedsDisplay call");
                     [layer setNeedsDisplay];
                 }];
             }