A few seconds after my umbraco 7.5.10 website restarted, i got this exception:

An unhandled exception occurred
System.IndexOutOfRangeException: Index was outside the bounds of the array.
   at System.Collections.Generic.List`1.Add(T item)
   at Umbraco.Core.Persistence.Database.PocoData.AddConverterToStack(ILGenerator il, Func`2 converter)
   at Umbraco.Core.Persistence.Database.PocoData.<>c__DisplayClass37.<GetFactory>b__34()
   at System.Lazy`1.CreateValue()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Lazy`1.get_Value()
   at Umbraco.Core.Persistence.Database.PocoData.GetFactory(String sql, String connString, Boolean ForceDateTimesToUtc, Int32 firstColumn, Int32 countColumns, IDataReader r)
   at Umbraco.Core.Persistence.Database.<Query>d__7`1.MoveNext()
   at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
   at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
   at Umbraco.Core.Persistence.Database.Fetch[T](String sql, Object[] args)
   at Umbraco.Core.Persistence.Database.Fetch[T](Sql sql)
   at Umbraco.Core.Persistence.Repositories.LanguageRepository.PerformGetAll(Int32[] ids)
   at Umbraco.Core.Cache.FullDataSetRepositoryCachePolicy`2.PerformGetAll(Func`2 getFromRepo)
   at Umbraco.Core.Cache.FullDataSetRepositoryCachePolicy`2.GetAll(TId[] ids, Func`2 getFromRepo)
   at Umbraco.Core.Persistence.Repositories.RepositoryBase`2.GetAll(TId[] ids)
   at Umbraco.Core.Services.LocalizationService.GetAllLanguages()
   at Umbraco.Web.Routing.PublishedContentRequestEngine.FindDomain()
   at Umbraco.Web.Routing.PublishedContentRequestEngine.PrepareRequest()
   at Umbraco.Web.UmbracoModule.ProcessRequest(HttpContextBase httpContext)
   at Umbraco.Web.UmbracoModule.<Init>b__8(Object sender, EventArgs e)
   at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

This persisted until I restarted the web app. The website and database are hosted on Azure.

Does anyone know the reason for this issue? Should I add a request to the issue tracker for this?

Thanks!