I have the same problem when selecting/edited nodes or curves using single finger pressure. After I researched ios bugs I discovered the affinity problem may be related to an ios glitch : A round magnifying glass appears when highlighting text on single finger long press on documents e.g. pdf text etc., a different magnifier from the main magnifier you can turn on or off in the accessibility settings. This highlighter loupe is in the ios code. Regarding affinity: Somehow ios mistakens single finger long press node editing or multiple curve selection with text selection and pops up their round text highlighter. Therefore affinity would need to suppress ios code which controls touch hold text highlighter feature. Please search for disable ios text highlighter on stack overflow for further info. On this problem. I’m not a programmer so forgive improper use of terminology, i hope i’ve been clear enough. I believe this will clear this very annoying problem.