Broken icon image links at f-droid.org website.
Some packages listed at https://f-droid.org/en/packages/ do not have an icon associated and that results in a broken image on the website. Example packages are /d/gapps and Addi. The image URL points to https://f-droid.org/repo/ which returns a "500 Internal Server Error" that probably does not get cached and hits the origin server.
When you go to the package page https://f-droid.org/en/packages/org.droidtr.deletegapps/ then a default icon is displayed. I recommend using the same default icon in the package list for all packages that do not have an icon associated.