Unable to debug code in Subscriber after Cumulative Update 6 for NAV2017

Hi,

I found that debugger stops responding once it hit the break-point inside code of a subscriber function. This happened after doing Cumulative Update 6.
Starting a debugger session after just stops responding. Compiling objects and restarting service does not help.

I was able to replicate this issue in standard Demo Database 10-0 on clean CU6 database and installation.

Anybody has similar issues?

This is a log from event viewer:

StackTrace:
at Microsoft.Dynamics.Nav.Runtime.ALDebugger.get_Instance()
at Microsoft.Dynamics.Nav.Runtime.DebuggerCallStackDataProvider.GetAllItems(Boolean& isOrderedByPrimaryKeyAscending)
at Microsoft.Dynamics.Nav.Runtime.EagerVirtualDataProvider.Find(FindProviderRequest request, Func`1 onlyCurrentKeyNeededForNextRow)
at Microsoft.Dynamics.Nav.Runtime.EagerVirtualDataProvider.Count(DataProviderRequest request)
at Microsoft.Dynamics.Nav.Runtime.EagerVirtualDataProvider.Exists(DataProviderRequest request)
at Microsoft.Dynamics.Nav.Runtime.DataAccess.Exists(ExistsCacheRequest request)
at Microsoft.Dynamics.Nav.Runtime.RecordImplementation.IsEmpty()
at Microsoft.Dynamics.Nav.BusinessApplication.Page9504.OnFindRecord_Scope.OnRun()
at Filter.InvokeWithFilter(NavMethodScope )
at Microsoft.Dynamics.Nav.Runtime.NavMethodScope.Run()
at Microsoft.Dynamics.Nav.BusinessApplication.Page9504.OnFindRecord(NavText which)
at Microsoft.Dynamics.Nav.Runtime.NavForm.FindRecord(String which)
at Microsoft.Dynamics.Nav.Service.NsFormDataAccess.Find(String searchMethod)
at Microsoft.Dynamics.Nav.Service.NSPage.PositionDataAccess(NsDataAccess recDataAccess)
at Microsoft.Dynamics.Nav.Service.NSPage.PopulateSpecificPage(NavDataSet dataSet, NsDataAccess recDataAccess, Boolean& moreDataInReadDirection, Boolean& moreDataInOppositeDirection)
at Microsoft.Dynamics.Nav.Service.NSPage.PopulateCLRDataSet(NavDataSet dataSet, NsDataAccess recDataAccess, Boolean& moreDataInReadDirection, Boolean& moreDataInOppositeDirection)
at Microsoft.Dynamics.Nav.Service.NSPage.GetPageData(NavSession session)
at Microsoft.Dynamics.Nav.Service.NSPage.GetPage(NavSession session)
at Microsoft.Dynamics.Nav.Service.NSService.Microsoft.Dynamics.Nav.Types.INavService.GetPage(PageRequestDefinition pageRequestDefinition, NavRecordState state)
at SyncInvokeGetPage(Object , Object[] , Object[] )
at System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke(Object instance, Object[] inputs, Object[]& outputs)
at Microsoft.Dynamics.Nav.Service.ServiceOperationInvoker.RunInTransactionCombinator(ServiceOperation innerOperation, NSServiceBase serviceInstance, String syncMethodName, Object[] inputs, Object[]& outputs)
at Microsoft.Dynamics.Nav.Service.ServiceOperationInvoker.<>c__DisplayClass22_0.<Combine>b__1(NSServiceBase serviceInstance, Object[] inputs, Object[]& outputs)
at Microsoft.Dynamics.Nav.Service.ServiceOperationInvoker.TransientErrorRetryCombinator(ServiceOperation innerOperation, NSServiceBase serviceInstance, String syncMethodName, Object[] inputs, Object[]& outputs)
at Microsoft.Dynamics.Nav.Service.ServiceOperationInvoker.<>c__DisplayClass22_0.<Combine>b__1(NSServiceBase serviceInstance, Object[] inputs, Object[]& outputs)
at Microsoft.Dynamics.Nav.Service.ServiceOperationInvoker.ErrorMappingCombinator(ServiceOperation innerOperation, NSServiceBase serviceInstance, String syncMethodName, Object[] inputs, Object[]& outputs)
Source: Microsoft.Dynamics.Nav.Ncl
HResult: -2146233088