In editor's view, I have source text to the left and target text to the right. My problem is that suddenly, if I want to jump to another segment further up or down, or I scroll up or down in one of the texts, the other text does not automatically follow, i.e.. in editor's view the source segment and the target segment are not locked to each other. If I type something in the target segment and save, source and target are saved together, just as they are supposed to.

Would anyone happen to know anything about this issue?

Thanks a lot in advance!!

(I use SDL Trados Studio 2011).