First 20 Username & Password Columns Are Unreadable

[mh4it]

CSV is correctly generated, all fields are readable, but the first 20 - 30 entries
username and password fields are unreadable (& sporadic timecreated).
It appears that some of the CSV delimiters are corrupted and / or part of a password?

For example:

hostname	username	password	timeCreated
URL	:�u¦ÑpW	®aÅ�~���àÈÉn1�	7Ê[ Ò�N
URL	?�ñ��Þ�pú�	:"%�?���'	1494472076080

Extra Details:
This is an older login.json which has followed me on several machines (with Master Password rotated every few months).
Trying to export to KeePass after some type of problem with FF70, my MasterPassword would not work (used login.json & Key4.db backups).

[iothack]

I have the same issue but the first 50 rows seem to have the username/password either still encrypted or not properly decrypted. I am trying this with Firefox v72. I had a master password as well. Any help would be appreciated. Thanks,