SharePoint online accessible even after switching networks. What controls the time limit for this?

1. I have a conditional access policy which says user should be allowed to access SharePoint only when connected to company network. (ADFS deployed)

2. I also have the ability to connect to VPN from my home network

3. I Connected to the company network (VPN) from home and logged in to SPO. (Login successful)

4. I now disconnected the VPN and it switched my network to my home network

5. I am still able to access SharePoint online

What I am trying to understand is after how long will I not be able to access OneDrive on my home network? What setting controls this?