Where should website logo link to in an organization with multiple platforms? [duplicate]

We have an organization that has a /forum (discourse), a /news (ghost CMS), /learn(learning platform) and etc.

They all share a similar navigation with the organization’s logo in the middle and relevant navigational items.

Currently the logo on each platform links to the homepage of the currently visited platform.

I was wondering if changing the link of the logo to / (that has a pitch and cta to sign up) across platforms would cause confusion for the users.

What would be the best logo links/navigation strategy for sites with multiple platforms?