There's an issue regarding trend lines on 3D graphs which is also mentioned here: https://forum.fusioncharts.com/topic/5228-trendline-hidden-behind-3d-bars/
As per the attached image, I've noticed the issue still persists, as it's been almost 9 years since the original mention of the issue, I was wondering whether there was a fix for the issue coming at some point soon?
Thanks