I tried to adjust the thumbnail image size on product page via the theme settings, meaning trying to show 4 or 5 thumbnails instead of 3. However, it’s not showing the effect on UI side. What happened is that thumbnails become blur after I reduced the image width in the setting, but still only showing 3 thumbnails
Sorry to hear about the inconvenience, can you please share valid WP-ADMIN Login details of your Site in the below listed format on which you are facing the issue so that we can proceed further and check the issue on your Site and assist you accordingly.
Sorry to say but as far as all Thumbnail Images appearing is concerned we have checked with Login and without Login too, and all are appearing fine. Please refer to the following Video for reference: https://www.veed.io/view/05650ec9-1804-4b01-9658-e31103bc437f
Regarding the Thumbnail Images blurriness, you have defined the Thumbnail Image width as 80 under the Theme Settings which is why they are appearing as Blur. So, you need to remove that or increase your value.