Suddenly from today, the response of productVariants (GraphQL Admin API) has changed

Technical Q&A
1

Hi.

0 hits in productVariants query.
Of course, the product existed and I was able to get it until yesterday.
Does not hit if vendor contains half-width space.

Does not hit if vendor contains half-width space
Does not hit if vendor contains half-width space2422×1318 302 KB

But products query is fine.

Hit even if half-width space is included
Hit even if half-width space is included2406×1330 316 KB

Is this a bug in the GraphQL Admin API?
If it’s not a bug, is there a good solution?

Thank you.

Tsuyoshi