Force Update via Policy - After Bulk Install

Hi All.
We have rolled out a little while ago 15.50.5.0 as bulk custom using MSI.

I am wanting to force all installs (host) to a specific version.
I have updated policy with the following:
Check for new version - Daily *Enforce
Install new versions automatically - All Updates (includes new major versions) *Enforce
Update to specific version - {chosen version} *Enforce

Now on clients host installs, it presents saying there is new version but wont actually install it.
I have searched quite a fair bit, have been unable to find exact reason why.
Yes we did bulk install using MSI, we are on tensor. Surely doing MSI is not the cause for it to not auto update?
I do not want to have to push out via InTune or SCCM another update when this option is meant to work.

Can someone help and provide any examples if they have got it to work some how?
I have also created a test Device Group to see if i can do it via that but nope there is no option to. Why can't we select all and force to update instead of having to remotely jump on and update them or run a powershell / cmd etc.