Variant generation/storefront presentation problem

I’m experiencing some issues with variant generation and storefront presentation.

When I try to create a new variant, it just keeps loading. If I tap “Cancel,” I can see the variant I just created. However, when I try to add another one, the system becomes very laggy. Sometimes the same property gets duplicated (for example, “blue” appears twice), which should not be possible.

I can activate the product with the variants I’ve created, but since the storefront presentation doesn’t work, only one variant is visible in the e-shop. Additionally, when I click on the storefront presentation, it just keeps loading and never opens.

Also, when I try to save some changes, it sometimes takes a very long time to save, which has never happened before.

I would really appreciate any suggestions or guidance on how to resolve this.

Thank you!