Copying text is impossible in pre-made titles

I tried switching between different titles to find the one that I liked and to my surprise I discovered that it was impossible to copy and then paste the text I wrote from one title to another. The options I got (on iPhone) where to delete and translate. Nothing else. So I had to rewrite my pretty long text every time I tried to find a more or less manageable title that I could edit. That is very time consuming. It would be very nice to be able to copy and paste text! Thanks!