What do you mean by this "troubling"? "causing problems"?
gu21)In the past, news reporters were usually very diligent about identifying the sources of information they presented. Recently, through, I've noticed a troubling trend. Reporters are neglecting their duties to the public, choosing to keep their sources anonymous...
Sort of. 'Causing problems (=uncomfortableness, not actual difficulties) to the writer/speaker.
It may cause the same sort of confusion to readers/listeners, though I think a careful writer might choose another phrase for that - e.g. 'possibly confusing/ambiguous'.