SUMMARY If you have a 4K screen you will probably need to increase Latte Dock's size to see it confortably. But if you go up to 72 pixels or even upper, you will start to see that some icons begin to appear cutted by their sides. Please see the attached screenshot. Plasma 5.18.1, KF 5.67
Created attachment 126218 [details] Latte Dock at 80 px height
These are not icons, these are applets. Try the following. Right click the panel, Rearrange and configure your applets, hover the in question applet and from the tooltip that will appear click the Lock button.
Ok, that solved the visual glitch. 👍 Eujaristó!