[BUG] Incorrect rendering of multi-selection filter when choosing multiple values

[mjabascal10]

Describe the bug
The multi-selection filter is not rendering correctly when selecting multiple values.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'Threath Managment / Alerts'
2. Click on 'View Rules'
3. Select more than one value in filter tag
4. See error