XGrammar Invalid Token-ID

[Whadup]

I am using the following grammar for guided generation:

      root ::= [wWuUaAfFqQ] [kKhHvViIsS] completion terminator
      completion ::= "" | [a-zA-Z] completion
      terminator ::= " " | ""

with the model Llama-3.2-1B-Instruct-q4f16_1-MLC

and quite frequently I get the following error when I prompt my model. I'm running on v0.2.80.

Users/cfruan/Documents/xgrammar/cpp/matcher.cc:273: Check failed: (token_id >= 0 && token_id < tokenizer_info_.GetVocabSize()) is false: Invalid token id -1789744523 for GrammarMatcher

How can I debug this further?