Student or Learner
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'.