Azure SQL MI - SQL agent job failure notification does not show correct host name

I have Azure SQL MI - SQL agent job notification setup to send an email whenever SQL agent job fails. However, I noticed that job failure email notification does not show correct host name within email subject body. for example: Azure SQL MI host name is

-region-dev-sqlmi.random.database.windows.net

but notification email has different host name in email subject. for example, email comes with host name as

\\ABCDEF123GHI456\zyab456rdse333

Azure SQL MI- SQL agent job has some limitations so can't change properties. What could be the reason behind agent job notification display incorrect host name ?