I did SFT / RL post-training on Qwen3 models a bit. This is an issue that dates back long ago. My favorite theory is that they had many model variants internal

I did SFT / RL post-training on Qwen3 models a bit. This is an issue that dates back long ago. My favorite theory is that they had many model variants internally, each using a slightly different chat template, so when it comes to the release they are not even sure what to use any more.