Sheet metal flat pattern is not consistent, one corner is notched different than the others, I have never seen this before and I can't fix it, been a user since 1999. has anyone seen this? I'm using 2021

Sheet metal flat pattern is not consistent, one corner is notched different than the others, I have never seen this before and I can't fix it, been a user since 1999. has anyone seen this? I'm using 2021

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