OpenHands [Bug]: OpenHands stalls indefinitely after successful command

Is there an existing issue for the same bug?

[x] I have checked the existing issues.

Describe the bug and reproduction steps

I was running a task, and it has stalled indefinitely with the three dots moving up and down.

The previous bash script finished successfully and wrote out about 200 lines of output.

In my log I saw this:

==============
[Agent Controller 094dda80f3fa493787c7c320a597f0db] LEVEL 0 LOCAL STEP 78 GLOBAL STEP 78

15:22:08 - ACTION
[Agent Controller 094dda80f3fa493787c7c320a597f0db] **CmdRunAction (source=EventSource.AGENT, is_input=False)**
THOUGHT: Now let's run the verification again:
COMMAND:
cd /workspace/prompt-based-reranker && python verify_ensemble.py
15:22:09 - OBSERVATION
[Agent Controller 094dda80f3fa493787c7c320a597f0db] **CmdOutputObservation (source=EventSource.AGENT, exit code=0, metadata={
  "exit_code": 0,
  "pid": -1,
  "username": "root",
  "hostname": "e595159ef0da",
  "working_dir": "/workspace/prompt-based-reranker",
  "py_interpreter_path": "/openhands/poetry/openhands-ai-5O4_aCHf-py3.12/bin/python",
  "prefix": "",
  "suffix": "\n[The command completed with exit code 0.]"
})**
--BEGIN AGENT OBSERVATION--
...
[The command completed with exit code 0.]
[Current working directory: /workspace/prompt-based-reranker]
[Python interpreter: /openhands/poetry/openhands-ai-5O4_aCHf-py3.12/bin/python]
[Command finished with exit code 0]
--END AGENT OBSERVATION--


==============
[Agent Controller 094dda80f3fa493787c7c320a597f0db] LEVEL 0 LOCAL STEP 79 GLOBAL STEP 79

INFO:     172.17.0.1:55280 - "GET /api/options/config HTTP/1.1" 200 OK
INFO:     172.17.0.1:55266 - "GET /api/conversations/094dda80f3fa493787c7c320a597f0db HTTP/1.1" 200 OK
INFO:     172.17.0.1:55258 - "GET /api/settings HTTP/1.1" 200 OK
15:23:24 - openhands:INFO: standalone_conversation_manager.py:83 - Conversation 094dda80f3fa493787c7c320a597f0db connected in 0.06486177444458008 seconds
15:23:24 - openhands:INFO: standalone_conversation_manager.py:64 - Reusing active conversation 094dda80f3fa493787c7c320a597f0db
INFO:     172.17.0.1:55292 - "GET /api/conversations/094dda80f3fa493787c7c320a597f0db/web-hosts HTTP/1.1" 200 OK
INFO:     172.17.0.1:55306 - "GET /api/conversations/094dda80f3fa493787c7c320a597f0db/vscode-url HTTP/1.1" 200 OK
INFO:     172.17.0.1:55294 - "GET /api/github/user HTTP/1.1" 200 OK
INFO:     172.17.0.1:55868 - "GET /api/settings HTTP/1.1" 200 OK
15:25:34 - openhands:INFO: standalone_conversation_manager.py:83 - Conversation 094dda80f3fa493787c7c320a597f0db connected in 0.022493362426757812 seconds
INFO:     172.17.0.1:55880 - "GET /api/conversations/094dda80f3fa493787c7c320a597f0db/list-files HTTP/1.1" 200 OK
INFO:     172.17.0.1:60710 - "GET /api/settings HTTP/1.1" 200 OK
INFO:     172.17.0.1:57870 - "GET /api/settings HTTP/1.1" 200 OK