Works with AJAX enabled?

No it doesn't appear to, im seeing the same result as yourself - filters that are displayed externally to the view are reloading the page.

Attaching a patch that fixes this for me, again, it needs the core patch from https://www.drupal.org/project/drupal/issues/2894747 🐛 Views hardcodes exposed filter block form ID's which breaks AJAX when the same form is shown multiple times on one page Needs review

The patch applied, mention by aaron.ferris, solved the problem of the page being reloded after activating AJAX on the view and the exposed filter.

Patch #3 fixes the problem. I had to apply the patch on the core as instructed. It didn’t work the first time even though I clear the cache every time I make a change. I have 2 “Configurable Views Filter Block” blocks, one of which is displayed with twig tweak and the settings were not taken into account but it finally worked by testing different combinations.