@coconnor @MarcP 

"I have a team that cannot reverse JEs without a password, so it's all on me to enter the password and reverse."

When are you getting the prompt to enter the password?  When you click 'Reverse' at the bottom of the original JE or when you click Save on the reversing entry?  And, to confirm, the reversing entry is dated the 1st of the month following the original JE?