Description of problem:

We are deploying the Openshift 3.11 cluster using the aws_ec2.yml dynamic inventory plugin. When logging is enabled the cluster build fails with the issue mentioned here: https://github.com/openshift/openshift-ansible/issues/11697. This issue is not encountered when an ini style inventory file is used so it is related to the aws_ec2 plugin. 
Doing a diff on output, when using a ini inventory vs aws_ec2 sheds some light on what's going wrong: 

2 of the fact dicts returned are of type string rather than dict. The logic in conditional_set_fact.py is expecting them to be of type dict and hence it blows up

Version-Release number of the following components:

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Version-Release number of the following components:
openshift-ansible:  pointing at openshift-ansible-3.11.217-1 tag.
rpm -q ansible: ansible-2.8.12-1.el7ae.noarch
ansible --version: 
ansible 2.8.12
  config file = /etc/ansible/ansible.cfg
  configured module search path = [u'/home/ansible/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python2.7/site-packages/ansible
  executable location = /bin/ansible
  python version = 2.7.5 (default, Jun 11 2019, 14:33:56) [GCC 4.8.5 20150623 (Red Hat 4.8.5-39)]
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How reproducible:
Every time

Steps to Reproduce:
1.
2.
3.

Actual results:
Please include the entire output from the last TASK line through the end of output if an error is generated

Expected results:

Additional info:
I found reference to a workaround in Case number: 02587009, which works by adding a dict:

"{{ hostvars[inventory_hostname] | to_json | from_json }}"

I can confirm this workaround worked for my customer but they would like a permanent fix for this rather than an unmanaged workaround.