qwythos-9b-claude-mythos-5-1m breaks on the second message

LocalAI version:
LocalAI v3.12.1 (fcecc12e57be39bad2ebf50cf729408b64409553)
latest-aio-cpu

Environment, CPU architecture, OS, and Version:
ubuntu 24.04 . x86)64 r9 9950x . 89 GB DDR5
Linux linshyv 7.0.0-27-generic #27-Ubuntu SMP PREEMPT_DYNAMIC Thu Jun 18 19:13:49 UTC 2026 x86_64 GNU/Linux

Describe the bug
i can ask one question using the chat tab to a model before it spits out a rpc error on the second question

To Reproduce
1start the aio cpu image. let it download everything until it's done.
2 install the qwythos-9b-claude-mythos-5-1m model
3/4 just send it hi twice and on the second message it'll spit out

Internal error: rpc error: code = InvalidArgument desc = Unable to generate parser for this template. Automatic parser generation failed:

While executing CallExpression at line 151, column 28 in source:
... {%- else %}↵ {{- raise_exception('Unexpected message role.') }}↵ {%- ...
^

Error: Jinja Exception: Unexpected message role.

Expected behavior

i expected the model to just keep answering questions as it did on the first one while keeping in mind previous questions(context)

Logs

Additional context
gpt 4 and gpt4o do not exhibit this behavior

this is on default settings nothing altered

Reproduce the failure in the chat tab using the latest-aio-cpu image and the qwythos-9b-claude-mythos-5-1m model, sending two messages. Start from the reported automatic parser generation error and its Jinja template trace; done means the second message receives a response while retaining prior context.