I have the same problem with all YAML file in template for which today’s date would be inserted when the template is applied to a note.
created: {{date}}
becomes
created:
“{ date }”:
and the property is no longer recognised as a date and it’s content is as above
If I fix it in source mode, it works for a while.
Making sure I switch to source mode before making opening and making hanges to a template temporarily solves the problem, but it is not ideal.
I just want to echo that I and others also have the same issue.
I also have this additional issue, the 2 number from YYYY at the end gets added to the front of DD, so instead of seeing 12-09-2023, it becomes 2012-09-20.