The question titles get blank when collect is inactive for a while

Hi Dominika,
Thanks a lot for taking a look at this.
This question is the first on of a repeat group for places. The form is the one posted here : ODK to collect species and habitats localities, as pressure and threats to ecosystems - #10 by mathieubossaert
This places repeat contains a repeat for observations. Its last question is an "annotate" image.
But before asking for a new place, a calculate string maybe shown in a note, id the user did ask for it in the form preferences...