Number of snippets in the snippets page is wrong
### Summary
Go to https://gitlab.com/dashboard/snippets?scope=are_internal, the number of snippets is wrong
### Steps to reproduce
- Create a private group with a private project
- Create an internal snippet in the group
- Leave the group
- Go to `Snippets` page
### Example Project
N/A
### What is the current *bug* behavior?
I see I have one snippet, but no one is shown
### What is the expected *correct* behavior?
I shouldn't have any snippet
### Relevant logs and/or screenshots

### Output of checks
This bug happens on GitLab.com
issue