Disappearing Text and text box

[PieterOt]

I took a screenshot. In the editor I wanted to add text. Clicked on the text button in the tool bar created my text box. Double clicked in the text box. I now have a cursor flashing. I type in my text. Now I want to save my screenshot with the new text. As soon as I click anywhere, the text dissapears. The dialog box on the bottom in the editor says to get out of the editing mode to click the white arrow in the tool bar. (There is no white arrow). Or click the "close" button above (There is no close button above)
I tried everything but whatever I do makes the text go away. I tried to save it, escape, exit and clicking on any button to start a new edit. The text dissapears. Very frustrating.

[Ath]

What is the font size? If the font is too large it won't show...

[PieterOt]

The font is smaller than the box I am typing it in. I can see what I am typing. Then I click anything anywhere the text disappears but the box stays. I have never had this happen with any other editor.