Add Qwen 3.5 to FORCE_FLOAT32 (#4134)

* Add Qwen3.5 to FORCE_FLOAT32

* fix vision encoder dtype mismatch

* revert vision cast changes

unsloth/models/loader.py

@@ -106,6 +106,7 @@ FORCE_FLOAT32 = [
     "gemma3text",  # Gemma3TextModel (EmbeddingGemma, standalone text-only Gemma3)
     "gemma3n",
     "gpt_oss",
+    "qwen3_5",  # Qwen3.5 RMSNorm uses (1+w) pattern like Gemma3, overflows float16
 ]
 
 global DISABLE_COMPILE_MODEL_NAMES

unsloth/models/vision.py

@@ -1054,6 +1054,7 @@ class FastBaseModel:
             do_forced_float32 = do_forced_float32,
             correct_dtype = correct_dtype,
         )
+
         try:
             model, tokenizer = patch_tokenizer(model, tokenizer)
         except Exception as _patch_err: