Process Email Templates not working for relationship fields for current activity

Hi All,

We are facing issue with many process email templates which has relationship fields for current activity or relationship fields of any module or link from related module.

Please check syntax below:

Syntax for current_activity link:

{::href_link::<Custom_Module>::current_activity::name::}

{::href_link::Contacts::accounts::name::}

Syntax for relationship field:

{::<Custom_Module>_opportunities_1::name::}

Can anyone suggest on what might be the root cause for the same.

Thanks,

Shreya