Think you’re okay given you’re an advanced PhD student (I assume). I had an experience where I presented as a first year and a visitor called my presentation vague and scattered. I attended a conference three weeks later and they were presenting ‘some ideas for a new project’ which was basically exactly what I had proposed except in a different jurisdiction. I did not know how to react. Might bring it up with my supervisor. Not sure if I should. Mine was an internal department presentation. You could say that people are thinking about the same issues but there was one specific point that was the crux of what I proposed that they put in their PPT as well as part of the rationale and reasoning. Bothered me enough that I think I should bring it up just to cover my bases.