Unidentified error message in logfile HOME ASSISTANT CORE

I have an error message in my HA core logfile and I cannot find the module, that causes it.
ERROR (MainThread) [homeassistant.helpers.template] Template variable error: list object has no element 1 when rendering '{{ value.split("(")[1].split(")")[0] }}
What I found out:

  • The message comes exactly every 10 minutes
  • There is no automation or script in my configuration, that containts the command {{ value.split("(")[1].split(")")[0] }}
  • I have no automation in my configuration, that is triggered in a 10 min interval

I assume, the message comes from a HA integration.

Can somebody give me a hint, where this message comes from?