Here is the page in question: https://lilexo.com/mini-wifi-cam

Not sure which CSS causes this because now I can’t look into the custom HTML module but I think it is this one:

 <!-- Link Swiper's CSS -->
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/css/swiper.min.css">
<link rel="stylesheet" href="https://firebasestorage.googleapis.com/v0/b/sweepstakes-35b7b.appspot.com/o/resources%2Fvideo.popup.css?alt=media&token=467ca33f-dd39-4c10-8338-52e94bb00f68">

In another page, the same thing happened when I added this jQuery reference:

 <link rel="stylesheet" href="https://firebasestorage.googleapis.com/v0/b/sweepstakes-35b7b.appspot.com/o/resources%2Fjquery-ui.css?alt=media&token=0b0c210e-a2aa-48e8-be1d-4698ec5b70bc">
  <link rel="stylesheet" href="https://firebasestorage.googleapis.com/v0/b/sweepstakes-35b7b.appspot.com/o/resources%2Fstylev2.css?alt=media&token=1f394de6-784a-428f-968b-b81b99660f39">