This is what their CEO has to say
https://twitter.com/FurmannD/status/1321016678868832261
As we have already started the restructuring of the company and the liquidation process of the HK entity, we needed to change the legal entity in the AppStore too.
After reaching out to Apple Developer Support, Lumi was advised to create a new Apple Developer account using the Cyprus company and to transfer the Lumi app to the newly created account.
We decided that everything was fine and did strictly as advised. It took us about several weeks and $99, everything was done, and we had transferred our apps.
While preparing a new app version release we received an email from App Store Connect saying:
“We identified one or more issues with a recent delivery for your app, "Lumi Crypto Wallet" ...Your delivery was successful, but you may wish to correct the following issues in your next delivery: ITMS-90076: Potential Loss of Keychain Access - The previous version of software has an application-identifier value ['TeamID-XXX.com.lumiwallet.HD'] and the new version of software being submitted has an application-identifier of ['Team ID-YYY.com.lumiwallet.HD']. This will result in a loss of keychain access.”
What does it mean?
That definitely surprised us (in a negative way), as in different words it says that ALL our users will be logged out from the application if we release a new version from the new account because our Team ID has changed and the Lumi app will no longer have access to the Keychain as the keychain pass includes the Team ID in its string.