My homepage redirects unwantedly to my contact page.

For some reason, after I’ve created a new contact page for my new website my homepage redirects to it.
After I deleted it, it still redirects and shows an 404 error. My reading settings are set to latest posts, but it still redirects

After I’ve deactivated all my plugins, this problem was solved. But I can’t seem to find the plugin that causes this problem.

Any suggestions on how to get this solved?

Thanks