Topic: can we perform an element check when selecting or loading the element?
for the following error see https://qelectrotech.org/forum/viewtopic.php?id=1780
each connection is given its own identification when it is inserted into a symbol. With your symbols it looks like the connectors have been copied and then pasted because the identifications are duplicated. As far as I know, this problem has been fixed (current version).
it is more convenient if Qet can already report these errors