Hi @debdstripe
Thanks for the bug report. This will take some debugging but I’m sure we can figure out what is going on.
My first idea is that the upgrade script is causing multiple fields to obtain the same field_key. This may explain why field settings are not loaded correctly.
Are you able to perform the upgrade again and check your wp_post table. Order the table via the post_type and find the acf-field posts. Do any of them have the same post_name?
