Use 'be at issue' to highlight the central point being debated or questioned in a discussion. During the meeting, the use of company resources was at issue.
Pro Tip 2/3
Main Concern
It shows what people are most concerned or troubled about in a situation. In the environmental conference, climate change was at issue.
Pro Tip 3/3
Public Interest
Often used when public interest or attention is drawn toward a particular issue. The safety regulations in schools are at issue after the recent incidents.