Bei Indesign 25 habe ich folgendes Problem.

Does it happen with every InDesign file or just a particular one? Apart from the IDML thing @Robert at ID-Tasker suggested it could as well be a corrupt font causing the issue, try and isolate that bit as well

-Manan

@laradie 

If transaltion is correct - if you mean when pressing spacebar when cursor is in the text - most likely your document is corrupted.

Try IDMLing - export as IDML, open, save with a new name - do not overwrite your original file.

Welches OS?

Hardware?