It is a known issue (maybe just with the USA library?).
https://archicad-talk.graphisoft.com/viewtopic.php?f=6&t=70923&start=20#p323137
The latest library update is supposed to fix it.
Or if you read the post before the one I linked to above, you can try changing the wall closure.
Barry.
One of the forum moderators.
Versions 6.5 to 27
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