I was going to say On Screen View Options > Clean Wall & Beam Intersections - but that appears to be on already.
You say you have checked layers.
Is the layer intersection group number set to zero?
If so, elements in that layer will not trim.
One of the forum moderators.
Versions 6.5 to 25
Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10
Dell Precision 3510 - i7 6820HQ @ 2.70GHz, 16GB RAM, AMD FirePro W5130M, Windows 10