In previous iterations of our build we were able to view erc-1155's minted via our platform from the MetaMask mobile application, however, now neither our NFT's or contract address are displaying in the MetaMask app -> wallet -> "NFTs" tab.
It is worthy to note that we do comply to the OpenSea standard and are identified on their platform here. Also, this issue was noticed within 24h of OpenSea implementation and we are not using ownable in our current iteration.
Any ideas?
I haven't tested this, but could it be that the OpenSea contract address is pointing to the Proxy address and not the ERC-1155 contract? I'm not sure how Metamask handles the displays of NFTs, OpenSea seems to be able to handle a proxy contract address, but maybe there's a limitation in MetaMask that only looks for ERC-1155 contract inheritance specifically to render in the wallet. Maybe follow up with the Metamask community forum at https://community.metamask.io/ to see if someone else has encountered the same issue with NFTs minted via use of an ERC1967Proxy upgradeable contract as you have implemented?
