### Issue Type Bug ### Source source ### Keras Version 3.6.0 ### Custom Code Yes ### OS Platform and Distribution Linux Ubuntu 24.04 ### Python version 3.10.15 ### GPU model and memory NVIDIA GeForce RTX 4060 8GB ### Current Behavior? The decoded sentence is the same as the input sentence ### Standalone code to reproduce the issue or tutorial link ```shell https://colab.research.google.com/drive/1NYqZTX0Cn4Gw4mRLt1hPUfXPIV0odrLs?usp=sharing ``` ### Relevant log output ```shell encoder_input_tokens = [[ 34. 1082. 119. 71. 72. 177. 11. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0.]] generated_tokens = [[ 2. 1082. 119. 568. 72. 177. 11. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0.]] ** Example 0 ** i grew up in that house. diciendo tengo manera ú ese ) ```