Minted NFTs showing as owner "null address"

[Erickx0]

Hello,

Maybe someone can provide some guidance. I minted 3500 NFTs under the whitelist , for giveaways. The transaction shows successful on the block explorer. However they do not show up on opensea under the total amount. When I go on opensea and look them up under the transaction history they do display. I then viewed it under the block explorer link from the opensea collection and it shows as the owner "null address" rather then my wallet address. However, the logs on the block explorer and metamask show the correct wallet address. I can see the images and metadata on opensea, but the owner is listed as null address and that keeps opensea as viewing those token IDs as minted NFTs on the collection. Any advise?

The NFTs are on the ETH mainnet and gas was paid for the mint. Also the total collection amount does display correctly on rarible. For some reason the owner of the token IDs minted on the 3500 original mint show a mix of the correct address and null addresses. Hope that makes sense!