Hello
If it is not the Narrator, do a clean boot. See if that still continues in clean boot environment, if not, it is a third party one for sure.
Here is instruction and how to narrow down.
Do a clean boot using this instruction: https://support.microsoft.com/en-us/topic/how-to-perform-a-clean-boot-in-windows-da2f9573-6eec-00ad-2f8a-a97a1807f3dd
Make sure you follow the instruction closely and do NOT disable the Microsoft services.