PBC - Priority based connections
I was editing a complex wall profile but found that the part of the wall I was trying to show was being overridden/trimmed by the floor slab.
I never use apply, not sure why it's there, I just edit, store, return to drawing and everything has updated.
I can't think how else you might have disconnected your existing beams.
Apple iMac Intel i9 / macOS Sonoma / AC27UKI (most recent builds.. if they work)