Hi,
I have a problem on the 2D Cabinet Layout page: 

I have realized the layout of an electrical panel containing components, terminals, conduits and DIN bars, but when I close the page and reopen it, often I see that some DIN bars have been removed and some terminal blocks have moved within the page.

Sometimes DIN bars are deleted and in the element selection table, they remain unchecked but without the possibility of being able to insert them because they are "already inserted"

How is all this possible?

Solidwork electrical 2023 SP4.0