Sales Contract Lines Not Visible in Sales Order from Different BU (Global BU setup confirmed)

Hello Experts,

We are facing an issue with the cross-BU visibility of Sales Contract lines, which seems contrary to our Global BU configuration.

Scenario:

BU A (Contract BU): Configured as a "Global Business Unit" under the 'Specify Customer Contract Management Business Function Properties'.

BU B (Sales Order BU): An operational BU that creates Sales Orders.

A Sales Contract is created in BU A for a specific customer.

Observation:

When a Sales Order is created in BU A (the same BU as the contract), the contract is correctly visible and the lines are retrievable.

However, when creating a Sales Order in BU B (a different BU), the contract lines from BU A are not visible/retrievable, despite BU A being set as the Global BU.