diff --git a/src/common/ai/restore_raw_linear.c b/src/common/ai/restore_raw_linear.c
index 5d19c5bf40c..a7b121a4cb5 100644
--- a/src/common/ai/restore_raw_linear.c
+++ b/src/common/ai/restore_raw_linear.c
@@ -1117,7 +1117,7 @@ int dt_restore_raw_linear_preview_piped(dt_restore_context_t *ctx,
       }
       const size_t pix = (size_t)sr_raw * raw_w + sc_raw;
 
-      if(is_linear)
+      if(is_linear && mip_channels >= 3)
       {
         // float mipmaps are already in [0, 1]; uint16 needs un-prepare
         for(int c = 0; c < 3; c++)
@@ -1136,6 +1136,12 @@ int dt_restore_raw_linear_preview_piped(dt_restore_context_t *ctx,
           }
         }
       }
+      else if(is_linear)
+      {
+        // 4BAYER (CYGM/RGBE) classified as LINEAR but has mip_channels==1.
+        // no canonical RGB→CYGM/RGBE mapping; leave the original mosaic
+        // pixel untouched (already in `patched` from the memcpy above)
+      }
       else
       {
         // X-Trans: re-mosaic
diff --git a/src/libs/neural_restore.c b/src/libs/neural_restore.c
index 1f622c9cbca..b5ea6950c63 100644
--- a/src/libs/neural_restore.c
+++ b/src/libs/neural_restore.c
@@ -1366,8 +1366,10 @@ static int _process_raw_denoise_one(dt_neural_job_t *j,
       // most LINEAR-class inputs are computational raws (Apple
       // ProRAW, Google HDR+, etc.) that have already been denoised
       // on-device; the model will run but adds little; Canon/Nikon
-      // sRAW is the exception; warn once per job and proceed
-      if(!j->linear_warned)
+      // sRAW is the exception; warn once per job and proceed.
+      // 4BAYER (CYGM/RGBE) piggybacks on LINEAR class but isn't a
+      // computational raw — skip the misleading toast
+      if(!j->linear_warned && !(flags & DT_IMAGE_4BAYER))
       {
         j->linear_warned = TRUE;
         dt_control_log(_("raw denoise: this image is already pre-demosaiced "
@@ -2720,8 +2722,10 @@ static gpointer _preview_thread_raw(gpointer data)
 
   // same caveat as the batch path: LINEAR is usually a computational
   // raw that's already been denoised on-device. warn once per imgid
-  // so picking a different patch doesn't re-toast
+  // so picking a different patch doesn't re-toast. 4BAYER piggybacks
+  // on LINEAR class but isn't computational — skip the toast for it
   if(cls == DT_RESTORE_SENSOR_CLASS_LINEAR
+     && !(img_meta.flags & DT_IMAGE_4BAYER)
      && d->preview_linear_warned_imgid != pd->imgid)
   {
     d->preview_linear_warned_imgid = pd->imgid;