Unity InputField, how to select other GameObjects with ONE touch on mobile devices?

I've been searching for this for quite long and I am stunned that there doesn't seem to be a solution except buying expansive assets...

When typing input into an Unity InputField for mobile devices, it is not possible to directly press something else, a button for example, because Unity uses the first touch ONLY to unfocus the InputField. However, for the user experience that is a MAJOR problem and in my eyes inacceptable.

Does anyone have a solution/workaround or any tip to get rid of that stupid behaviour? On the first sight it shouldn't be that hard to solve but because I don't know why it seems to be...