I would try deleting the nodes from NPM and rediscovering them. Unfortunately solarwinds seems to have a lot of animosity towards anything related traps and tends to not offer much in the way of support even though traps are still widely used by a **** ton of vendors and continue to be so. (just look at the trap viewer interface - looks like it hasn't been updated in over a decade...) I wish you luck...
I had similliar issue with your condition. Try to stimulate with another traps and trap viewer still showing on the wrong nodes.
Still open a ticket with solarwind support to resolve this.