Autosuggest unstable

I recently switched to Studio 2017 and now some terms do not get autosuggested in some segments. Here, I e.g. cannot get Studio to suggest the translation for “Servo-Vorschubapparat” in segment 171, but it works in the other segments on the screenshot. I've noticed that it’s general for segments were the term is contained twice, unfortunately that's not the only case.

Anybody knows a fix?