Search bar is no longer looking slick in the latest update to Drupal 8.8 compared to Drupal 8.5

[nickveenhof]

How it looks today

How it used to look:

Would be great if someone could help fixing it. To install this demo site, look at the scripts folder and see the install instructions. A demo of the existing code can be seen on drupalsear.ch and the theme where we make our own changes on top of umami is available in this repository under the docroot/themes/umami_search/ path.