Error with watched listings

When browsing as guest, selecting to 'watch' a listing while still a guest.. then logging in to your account.. the watched listing still shows the item from while you were browsing in the watched listing and not your account's watched listings. Furthermore, attempting to delete it creates an error message:

"=> Message: The specified entity is not contained in this EntitySet.

=> Stack Trace: at System.Runtime.CompilerServices.AsyncVoidMethodBuilder.b__0(Object state)"

When logging out an error popup states load operation failed for query 'getlistings' value cannot be null - source.