Using 2 Excel instances while using a COM Addin

Hi,

Here's the specifics of my setup:

Microsoft Excel for Office 365 MSO (16.0.12527.20612) 32bit

Windows 10

Here is my workflow:

2 Excel instances

1 normal, without any addins enabled.

1 with a COM Addin enabled, running COM Actions.

I would like to run the COM actions in the 2nd instance, while being able to use the normal excel instance. In Excel 2010, I'm able to run the COM Actions in the 2nd instance and use the 1st instance fine. In Microsoft Excel for Office 365 MSO (16.0.12527.20612) 32bit, if I run the COM Actions, the 1st instance is frozen, and I'm unable to interact with it.

Note that nothing about the COM Addin mentioned above changes, only the Excel version.

I've noticed that there is only 1 instance of Excel in the task manager for Microsoft Excel for Office 365 MSO (16.0.12527.20612) 32bit. Is this related?

Is there an option I can enable to try to get this to work? Is this not possible since Excel 2010?

Look forward to a reply.

Thanks!