Bugs

• Which version of WiX are you building with?

v3.11 and v4.01

• Which version of Visual Studio are you building with (if any)?

Visual Studio 2022 17.6.4

• If the problem occurs when installing your packages built with WiX, what is the version of Windows the package is running on?

Windows 10

I have these four Managed Bootstrapper applications (bundles):

1. Bundle A 1.0 (WiX3)
2. Bundle A 2.0 (WiX4)
3. Bundle B 1.0 (WiX3)
4. Bundle B 2.0 (WiX4)
   All four bundles install several different msi packages, but they also have one msi package (MsiCommon) in common.

Scenario 1: (as expected)
• Install Bundle A 1.0 and B 1.0 (or Bundle A 2.0 and B 2.0)
• Uninstall one of them and MsiCommon is still present due to dependency, see log:
Will not uninstall package: MsiCommon, found dependents:
Found dependent: {guid}, name: My MsiCommon

Scenario 2:
• Install Bundle A 1.0 (WiX3)
• Upgrade with A 2.0 (WiX4)
• The MsiCommon package is uninstalled by the cleanup of Bundle A 1.0

Scenario 3:
• Install Bundle A 1.0 (WiX3)
• Install Bundle B 2.0 (WiX4)
• Uninstall either A 1.0 or B 2.0 and the MsiCommon will be uninstalled (no dependencies found)

Conclusion:
It looks like bundles build with WiX3 cannot see dependencies from bundles build with WiX4 and vice versa.
In registry I can see that WiX4 dependencies have a version on the GUID but WiX3 have not:

{GUID MsiCommon}
---Dependents
------{GUID Bundle A 1.0}
{GUID MsiCommon}_v1.0.0
---Dependents
------{GUID Bundle B 2.0}