diff --git a/packages/ludic.render3d/gpu_vk_draw.ludic b/packages/ludic.render3d/gpu_vk_draw.ludic
index fdb3bd3e..b56bd38d 100644
--- a/packages/ludic.render3d/gpu_vk_draw.ludic
+++ b/packages/ludic.render3d/gpu_vk_draw.ludic
@@ -1012,8 +1012,8 @@ function gvk_frame_cb(render3d_st: mut Render3dState) -> pointer {
     # the frame in flight uses the other half of the ring and the other pool, unless it has this slot
     if render3d_st.gvk_frame_pending and (render3d_st.gvk_frame_pending_no & 1) == (render3d_st.gvk_frame_no & 1) { gvk_frame_wait(render3d_st) }
     gvk_frame_reset(render3d_st)
+    gvk_prime_submit(render3d_st)
     render3d_st.gvk_cb = gvk_once_begin(render3d_st)
-    gvk_prime_flush(render3d_st, render3d_st.gvk_cb)
   }
   return render3d_st.gvk_cb
 }
diff --git a/packages/ludic.render3d/gpu_vk_res.ludic b/packages/ludic.render3d/gpu_vk_res.ludic
index bdcc6b3f..7eab6624 100644
--- a/packages/ludic.render3d/gpu_vk_res.ludic
+++ b/packages/ludic.render3d/gpu_vk_res.ludic
@@ -775,6 +775,14 @@ function gvk_prime(render3d_st: mut Render3dState, b: int, buf: long) -> void {
   render3d_st.gvk_prime_h[render3d_st.gvk_prime_n] = buf
   render3d_st.gvk_prime_n += 1
 }
+# In a command buffer of their own, submitted and waited for at once: recorded into the frame's, a
+# buffer released later in that frame (a guest loading its models) was destroyed before the copy ran.
+function gvk_prime_submit(render3d_st: mut Render3dState) -> void {
+  if render3d_st.gvk_prime_n == 0 { return }
+  let cb = gvk_once_begin(render3d_st)
+  gvk_prime_flush(render3d_st, cb)
+  gvk_once_end(render3d_st, cb)
+}
 function gvk_prime_flush(render3d_st: mut Render3dState, cb: pointer) -> void {
   if render3d_st.gvk_prime_n == 0 { return }
   if render3d_st.gvk_prime_dst == 0 and not gvk_prime_target(render3d_st) {