Seems like I was able to create some 'glitchy' patterns.
They look fine in acnh pattern designer and thulinmas tool, the qr code however, when scanned with the nso companion app produces a garbled mess.
(retrying via the source image produces the same mess)
I attached the files.
Might have to do with the 'file -> qr' conversion ?
(My ACNH's game version is 1.6.0c, the tool of yours should be up to date aswell)
I already managed to create usable clothe patterns via thulinmas tool, these are the first patterns otherwise I did without save editing)