I created an assembly where a few parts are welded together via the insert function => assembly function => weld seam.
When I draw and import the weld seams and symbols via model object, they display well in my front and top views but not in my section views (which are on another drawing sheet.)
Some screenshots:
https://lut.im/QsNMSICLBn/SeSBIZRh8SUEBwOK.PNG => zoom on my A-A cut with front view and top view. I selected the weld seams to highlight them.
https://lut.im/AP0ehJaPun/T6jjGHkHb2Rhliv7.PNG => zomm on my A cut with its C detail where I should see the weld bead around the edge of my socket which is cut in the top image by the A-A cut
I think maybe you imported your solder before you did the details. Remove your cords and redo or redo the manipulation by selecting your cutting view as well as your details...
Finally, you can always tinker with insertion>annotation>weld bead and by clicking on the edges that interest you, but I still can't display my welds for cutting.
If you still have an old solidworks lying around, before 2011 when you create your welds, it generates parts for you so no problem in the MEPs. It's a shame that they abandoned this function. ..