Here are a few steps you can take to troubleshoot this problem:

1. Check External Influences: Ensure that there are no external commands or conditions that might be forcing the SFC into manual mode. Sometimes, other parts of the system might be inadvertently sending signals to switch modes

2. Review SFC Configuration: Verify the configuration settings of your SFC. Make sure that the auto/manual mode is not being locked or overridden by any fixed inputs in the external view

3. Inspect SFC Logic: Look into the logic of your SFC to see if there are any conditions or transitions that might be causing it to switch to manual mode. Sometimes, specific conditions in the sequence can trigger a mode change

4. Software Updates and Patches: Ensure that your system software, including any relevant patches or updates, is up to date. Sometimes, bugs in the software can cause unexpected behavior