I have an Unlocked SFDX Package with a
CustomObject__c and two Record Types
The object and the two types have existed in the package before my update. Before the upgrade all records of this type had either the one or the other RecordType.
The strange thing is that after my package upgrade all records lost their RecordType (meaning
RecordTypeId = null).
It's also strange that the CreatedDate of the two previously existing RecordTypes has changes to the date of the package upgrade. I don't get that.
What did I do wrong or is this a platform bug?