When loading and unloading a resource pack before validating, the game still reloads the current resource pack

The bug

When you load and unload a resource pack before validating, the game still reloads the current resource pack (even though there have been no changes).

How to reproduce

1. Go to the settings and then in "Resource packs"

2. Activate and deactivate a resource pack, so that in the end you have not changed anything

3. Validate and watch what happens

Example

Here is an example in video: