We are building SSIS applications in Visual Studio 2022. When editing an SSIS Script Task Visual Studio launches a VSTA project instance.
Normally the project will look something like this:

However, when a fellow developer does this, he sees this:

The Properties and References nodes are missing from the Solution Explorer and although the ScriptMain.cs does show in the code window – if you close it you cannot get it back.This occurs both in new, and existing projects/packages.

This problem does NOT occur in normal Visual Studio projects of other types – for this developer.

• We have tried switching the TargetServerVersion setting on the package, and it happens with both SQLServer2019, and SQLServer2022 settings.

• We have tried re-installing both the SQL Server Data Tools, and the “SQL Server Integration Services Projects 2022” for Visual Studio.

• We have tried repairing the “Visual Studio for Applications 2022”

• We have tried playing with the “Switch between solutions and available views” button on the Solution Explorer.

All my googling attempts have come up empty. Has anyone seen this issue before, and/or have an idea about how to get around it?