[Premium] Azure Portal template fail

**Describe the bug**
The template in the azure portal to create a flex consumption function app fails when used with a vnet integration saying the subnet doesn't contain tags.

**To Reproduce**
Steps to reproduce the behavior:
1. Go to Azure Portal in browser
2. Create a Function App
3. Choose Flex Consumption
4. Go thru wizard and choose to integrate with a vnet and add a subnet
5. Finish out the wizard and wait for creation

**Expected behavior**
The app should create and finish deployment without error. Instead you get an error that it can't find the tags property in the template. The ARM template is hosed.

**Screenshots**
I don't have one unfortunately.

**Additional context**
None