The most common problem arises when your Ansible module's argument/option expects an integer for example, but because jinja (using filter such as arg="{{ my_var

The most common problem arises when your Ansible module's argument/option expects an integer for example, but because jinja (using filter such as arg="{{ my_var | do_something }}" returns a string, so the spec of your module will reject the input! This is a hit or a miss in implementation. Dict, list, boolean, float, int, str are all acceptable primitives that must be handled properly.