Why does share location keep turning off?

For the past couple weeks my share location has been stopping all on its own. I keep having to share my location indefinitely. Is there going to be a fix for this? Like why does it happen? I got mad at my girl thinking she was the root of the cause but she says she didn’t do it and when I go to look for options to see if she has. There is no way to find out if she has or not.

also my read receipts keep turning off on its own as well. What do I do to fix this?