Below is the support response not surprising to me.
We appreciate you reaching out about this. At this point, we're finding that regarding the new builder, there are actually fewer customer-wide issues that are preventing users from building their apps. We're also over the hump in regards to missing features/options between the old and new builder. This is why we went ahead with the old builder sunset.
It looks like you're running into a bug that causes the setting for labels that were hidden in the old builder to not carry over into our new builder. We'll be escalating this issue to our development team and we'll reach back out to you with updates ones a fix has been rolled out.
Going forward, we'll be allocating all available resources to resolving known issues. We appreciate you bringing the above to our attention. We'll be in touch. Hope you're enjoying your weekend.