Flow execution stops at Condition node when multiple branches converge into single LLM node

[Sohorev]

Describe the bug

Flow execution stops at a Condition node without proceeding to any branch when multiple edges converge into a single LLM node. The flow terminates silently without error.

To Reproduce

1. Import attached bug-flow.json into Flowise
2. Start chat and send: hi

Expected behavior

Condition evaluates to false (not empty), takes output 1, executes to_operator

Actual behavior:

• Flow execution stops at the Condition node (flow.stopReason is empty)
• No branch is executed (neither output 0 nor output 1)
• No error is thrown
• Flow terminates silently
• Flow state shows:

  {
    "nextAgent": "",
    "intsructions": "",
    "stopReason": "not_empty"
  }

Workaround

If you duplicate the to_operator LLM node and route different branches to separate (but identical) nodes, the bug disappears. This confirms the issue is related to multiple edges converging into a single node.

Screenshots

Flow

bug-flow.json

Use Method

Docker

Flowise Version

3.0.10

Operating System

Linux

Browser

Firefox

Additional context

bug-flow.json

[Sohorev]

I have no objections if someone fixes this bug; I won't be able to do it myself.