diff --git a/app/legacy/onboarding.js b/app/legacy/onboarding.js
index 481f9b9e..c602d0a2 100644
--- a/app/legacy/onboarding.js
+++ b/app/legacy/onboarding.js
@@ -791,7 +791,13 @@
     // A layer open above the wizard (Settings, a floating window, the restart overlay) owns Esc.
     if (document.querySelector(".restart-overlay, .sw-overlay, .fw:not([hidden])")) return;
     const t = document.activeElement;
-    if (t && (t.tagName === "INPUT" || t.tagName === "TEXTAREA" || t.tagName === "SELECT")) return;
+    if (t && t.tagName === "SELECT") return;
+    // Typed text is not thrown away by a stray Esc: the first one leaves the field, the next closes.
+    if (t && (t.tagName === "INPUT" || t.tagName === "TEXTAREA") && String(t.value || "").trim()) {
+      e.preventDefault();
+      t.blur();
+      return;
+    }
     e.preventDefault();
     leave();
   }
@@ -843,6 +849,7 @@
     const saved = (resume || carry) ? restore() : null;
     if (saved && resume && saved.resumable) {
       Object.assign(ctx, saved.ctx || {});
+      save(false);                                      // resumed: from here an ordinary run, closable for good
       idx = Math.min(Math.max(saved.idx || 0, 0), steps.length - 1);
       // The project survived the restart; the in-memory handle did not.
       const pid = saved.ctx?.projectId;
diff --git a/modules/system/taste/store.py b/modules/system/taste/store.py
index 074f4f7b..73582258 100644
--- a/modules/system/taste/store.py
+++ b/modules/system/taste/store.py
@@ -46,7 +46,8 @@ MAX_ROWS = 200
 
 
 def valid(key) -> bool:
-    return isinstance(key, str) and bool(_KEY.match(key)) and not key.endswith((".", " "))
+    return isinstance(key, str) and bool(_KEY.match(key)) and not key.endswith((".", " ")) \
+        and not key.lower().endswith(".json")      # `latest.json` lives beside the keys: a key cannot share its name
 
 
 def _dir(key):
@@ -165,6 +166,8 @@ def rate(prompt_id, rating, axis=None):
     `rating` None clears: the row is removed, nothing is learned from that clip.
     `axis` only goes with "disliked" (see AXES); any other rating drops it.
     """
+    if not isinstance(prompt_id, str) or not prompt_id:
+        raise ValueError("a rating names the clip it is about (no prompt id was given)")
     if rating is not None and rating not in REWARD:
         raise ValueError(f"{rating!r} is not a rating")
     if axis is not None and axis not in AXES:
@@ -293,14 +296,22 @@ def _sound_rows(data):
     the wrong shape would break every later rating."""
     if not isinstance(data, dict) or not isinstance(data.get("rows"), list):
         return False
+    shapes = {}
     for row in data["rows"]:
         if not isinstance(row, dict) or isinstance(row.get("reward"), bool) or not isinstance(row.get("reward"), (int, float)):
             return False
+        if not isinstance(row.get("prompt_id"), str) or not row["prompt_id"]:
+            return False
         if row.get("axis") not in (None, *AXES):
             return False
         captured = row.get("rows")
         if not isinstance(captured, dict) or not all(isinstance(v, torch.Tensor) for v in captured.values()):
             return False
+        # What is stacked later must agree: one name, one shape (a key trained across two model
+        # families would otherwise abort every sampling that reads it).
+        for name, v in captured.items():
+            if shapes.setdefault(name, tuple(v.shape)) != tuple(v.shape):
+                return False
     return True
 
 
diff --git a/modules/system/taste/tests/test_taste_routes.py b/modules/system/taste/tests/test_taste_routes.py
index 67409261..f04adef5 100644
--- a/modules/system/taste/tests/test_taste_routes.py
+++ b/modules/system/taste/tests/test_taste_routes.py
@@ -124,3 +124,15 @@ def test_a_damaged_zip_and_an_empty_key_are_sentences_not_500s(server):  # noqa:
     status, out = _raw(server, "GET", "/funpack/api/m/taste/keys/fox/export")
     assert status == 400 and b"nothing to export" in out
     assert not store.valid("a ")
+
+
+def test_reserved_names_shapes_and_missing_prompt_ids_are_refused(server):  # noqa: F811
+    good = {"rows": [{"prompt_id": "p", "reward": 1.0, "rows": {"1": torch.ones(2)}}]}
+    assert _raw(server, "POST", "/funpack/api/m/taste/keys/import?name=latest.json", _zip_of({"reins.pt": _torch_bytes(good)}))[0] == 400
+    mixed = {"rows": [{"prompt_id": "p", "reward": 1.0, "rows": {"1": torch.ones(2)}},
+                      {"prompt_id": "q", "reward": -1.0, "rows": {"1": torch.ones(3)}}]}
+    assert _raw(server, "POST", "/funpack/api/m/taste/keys/import?name=x", _zip_of({"reins.pt": _torch_bytes(mixed)}))[0] == 400
+    nopid = {"rows": [{"reward": 1.0, "rows": {"1": torch.ones(2)}}]}
+    assert _raw(server, "POST", "/funpack/api/m/taste/keys/import?name=x", _zip_of({"reins.pt": _torch_bytes(nopid)}))[0] == 400
+    status, out = _request(server, "POST", "/funpack/api/m/taste/rate", {"rating": "liked"})
+    assert status == 400