Wilson, I have no idea if this will fix your problem or not. This happened when I was using X11 and here was the answer from tech support. I thought it was fixed, so your problem may be unrelated.
Tuesday, Jul 16, 2019 - 09:06 AM PDT
When inserting a wall schedule a strange vertical line appears when including 2d symbols for a default 8" concrete stem wall.
How can I fix this?
Support Answer -
Wednesday, Jul 17, 2019 - 02:02 PM PDT
Our development team is still looking into how to properly correct the issue. However, we have found that if you turn off Slabs in your layer Display Options, the line will no longer appear in your schedule. Keep it mind that turning off the Slabs display in that layer set will also have it not show up in any other views using that layer set.
Chief Architect Technical Support