[svenlind]

In Marvin and Mapleread it is possible to select a word in the text you are reading and activate a user defined menu.
The first picture shows how it looks in Marvin. You can now select one of the options. If you select the "share" option you get picture 2.

If you here select "Lemma", a special app, you get a translation into Danish. Other options from the menu can activate Wikipidia , Google maps etc. It works very well.

The third picture shows my problem. When you select the word it is only partly highlighted. You can adjust the selection but more often than not it does not work very well. The selection disappears.

Now to the strange thing. It works very well in some files and not in others about fifty fifty. If a file is okay in Marvin it is also ok in Mapleread and vice versa. The behavior is file dependent, also across devices, iPad Mini, iPhone, iPad pro 9.7 and iPad Pro 12.9.

I have not been able to find any system in the behavior. The files can be original epubs or converted from an Amazon format.
I have tried with different text sizes and fonts.

In all other programs, Safari Kindle etc, a press on a word will always select the whole word.