[BUG] Anthropic Agentflow Not Working

[dentro-innovation]

Describe the bug
Can't get a simple flow with sequential agents to work when using ChatAnthropic.
It does work with ChatOpenai and ChatMistral.

But with ChatAnthropic (any model) the user message seems to be inserted incorrectly into the condition agent, and the agent afterwards fails with Error buildAgentGraph - Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"messages: at least one message is required"}}

To Reproduce
Connect a start node to a condition agent and then to an agent. All powered by ChatAnthropic

Expected behavior
It runs successfully

Screenshots

Flow

Langsmith Traces:

Failed run with ChatAnthropic: https://eu.smith.langchain.com/public/4c001323-d1c2-461b-9a44-41d3fc2bebd5/r

Successful run with ChatOpenai: https://eu.smith.langchain.com/public/37096926-8a79-4d91-b345-81071ecab410/r

Additional context
Happens on both Flowise 2.1.3 and 2.1.5