When a package contains an "Execute SQL Task" which references a project connection manager SSISEnumerator fails on EnumerateSqlTask.

I tested it for packages targeting SSIS 2012 and received the stracktrace below when analyzing my SSIS source directory. SSIS project is in project deployment mode.

Stacktrace:
Enumerating projects...done.
Processing Project package 'XY'... Error The connection "{FD08C64A-...}" is not found. This error is thrown by Connections collection when the specific connection element is not found.
occurred whilst attempting to handle ispac C:\Development..
With stack trace at Microsoft.SqlServer.Dts.Runtime.Connections.get_Item(Object index)
at Microsoft.Samples.DependencyAnalyzer.SSISEnumerator.EnumerateSqlTask(Package package, String location, Int32 packageRepositoryID, TaskHost taskHost) in C:\Users\xy\Source\Repos\SQLServerMetadata\DependencyAnalyzer2008\SsisEnumerator.cs:line 1132
at Microsoft.Samples.DependencyAnalyzer.SSISEnumerator.EnumerateTask(Package package, String location, Int32 packageRepositoryID, DtsContainer dtsContainer) in C:\Users\xy\Source\Repos\SQLServerMetadata\DependencyAnalyzer2008\SsisEnumerator.cs:line 1062
at Microsoft.Samples.DependencyAnalyzer.SSISEnumerator.EnumerateTask(Package package, String location, Int32 packageRepositoryID, DtsContainer dtsContainer) in C:\Users\xy\Source\Repos\SQLServerMetadata\DependencyAnalyzer2008\SsisEnumerator.cs:line 1086
at Microsoft.Samples.DependencyAnalyzer.SSISEnumerator.EnumeratePackage(Package package, String location) in C:\Users\xy\Source\Repos\SQLServerMetadata\DependencyAnalyzer2008\SsisEnumerator.cs:line 1226
at Microsoft.Samples.DependencyAnalyzer.SSISEnumerator.EnumerateIntegrationServicePack(String integrationServicePack, String locationName) in C:\Users\xy\Source\Repos\SQLServerMetadata\DependencyAnalyzer2008\SsisEnumerator.cs:line 628.
Committing analysis information to database...Completed.