Accessing disposed model: Exceptions

Hi there,

I´m encountering several "IllegalModelAccessError: accessing disposed model" Exceptions when building my languages. I´m not aware of using "Disposed Models" and I can’t figure out which model I’m using is disposed.

Furthermore I’m not quite sure if it’s intended, that MPS is throwing about 10.000 of these Exceptions per Build.

[15426999]  ERROR -    jetbrains.mps.smodel.SModel - jetbrains.mps.smodel.IllegalModelAccessError :accessing disposed model
jetbrains.mps.smodel.IllegalModelAccessError: accessing disposed model
        at jetbrains.mps.smodel.SModel.checkNotDisposed(SModel.java:950)
        at jetbrains.mps.smodel.SModel.getNodeById(SModel.java:464)
        at jetbrains.mps.vcs.diff.DiffBuilder.collectChanges(DiffBuilder.java:65)
        at jetbrains.mps.vcs.diff.DiffBuilder.<init>(DiffBuilder.java:56)
        at jetbrains.mps.vcs.changesmanager.ModelChangesManager$9.run(ModelChangesManager.java:637)
        at jetbrains.mps.ide.smodel.WorkbenchModelAccess$1.run(WorkbenchModelAccess.java:80)
        at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:770)
        at jetbrains.mps.ide.smodel.WorkbenchModelAccess.runReadAction(WorkbenchModelAccess.java:76)
        at jetbrains.mps.vcs.changesmanager.ModelChangesManager.update(ModelChangesManager.java:635)
        at jetbrains.mps.vcs.changesmanager.ModelChangesManager.access$1600(ModelChangesManager.java:84)
        at jetbrains.mps.vcs.changesmanager.ModelChangesManager$10.run(ModelChangesManager.java:678)
        at jetbrains.mps.vcs.changesmanager.SimpleCommandQueue.runTask(SimpleCommandQueue.java:25)
        at jetbrains.mps.vcs.changesmanager.ModelChangesManager.setEnabled(ModelChangesManager.java:669)
        at jetbrains.mps.vcs.changesmanager.ProjectTreeChangesHighlighter$3.run(ProjectTreeChangesHighlighter.java:144)
        at jetbrains.mps.vcs.changesmanager.SimpleCommandQueue$MyExecutorThread.run(SimpleCommandQueue.java:78)

Best regards,
Simon