Lay out wont let the dimension tool snap to model

The dimension won’t snap to model in lay out. it will snap to components in model but not basic line work.
never had this issue before and only affects one model. any ideas why. other files and models work fine.

Share the file so we can see what you are working with. Are you still using SketchUp 2020 as your profile says?

Seems the experimental render engine won’t let the dimension tool snap to a model. it works when we go back to the classic. we are running SU2024. Macbook pro M2 max. Sometimes it works great and sometimesits just a spinning wheel.