diff --git a/src/layout/layered.c b/src/layout/layered.c
index 85f24344..de392ef8 100644
--- a/src/layout/layered.c
+++ b/src/layout/layered.c
@@ -95,6 +95,10 @@ void loop_layout_layered(VGMSTREAM* vgmstream, int32_t loop_sample) {
                 data->layers[layer]->current_sample = data->layers[layer]->loop_end_sample; /* forces do loop */
                 vgmstream_do_loop(data->layers[layer]); /* guaranteed to work should loop_layout be called */
             }
+            else {
+                /* needed when mixing non-looping layers and installing loop externally */
+                seek_vgmstream(data->layers[layer], loop_sample);
+            }
         }
     }
 
diff --git a/src/vgmstream.c b/src/vgmstream.c
index f3697f4a..fb46a868 100644
--- a/src/vgmstream.c
+++ b/src/vgmstream.c
@@ -796,6 +796,12 @@ void close_vgmstream(VGMSTREAM* vgmstream) {
 void vgmstream_force_loop(VGMSTREAM* vgmstream, int loop_flag, int loop_start_sample, int loop_end_sample) {
     if (!vgmstream) return;
 
+	/* ignore bad values (may happen with layers + TXTP loop install) */
+    if (loop_flag && (loop_start_sample < 0 ||
+            loop_start_sample > loop_end_sample ||
+            loop_end_sample > vgmstream->num_samples))
+        return;
+
     /* this requires a bit more messing with the VGMSTREAM than I'm comfortable with... */
     if (loop_flag && !vgmstream->loop_flag && !vgmstream->loop_ch) {
         vgmstream->loop_ch = calloc(vgmstream->channels, sizeof(VGMSTREAMCHANNEL));