Dynamically updating SSAS connection though expression not working after latest 2016 SSIS update

Hi,

I have a package that is loading our data warehouse and the last task is to process our cube. Since we have two prod SSAS Servers, I have a for each loop container that is processing each server. We have the connection strings in a table in our database.

1. Retrieve connection strings from database
2. Assign the result set to a object data type
3. In the For Each Loop Container, loop through the object type variable and also map the value to a string variable
4. I have an expression in the package level connection for SSAS to take the value from the string variable.

This was working fine, until the the latest SSIS update. It seems like this patch broke that piece and now its not updating the default connection string.

I have read articles about this issue being reported for SSIS 2012 in the past. I'm wondering if microsoft reintroduced this bug again in SSIS 2016.