Fix potential rare NullReferenceException in GrainTimer (#6043)
Fix potential rare NullReferenceException in GrainTimer (#6043)


amccool/orleans,waynemunro/orleans,ibondy/orleans,ElanHasson/orleans,ReubenBond/orleans,jason-bragg/orleans,waynemunro/orleans,hoopsomuah/orleans,benjaminpetit/orleans,dotnet/orleans,veikkoeeva/orleans,yevhen/orleans,dotnet/orleans,ElanHasson/orleans,hoopsomuah/orleans,galvesribeiro/orleans,amccool/orleans,amccool/orleans,yevhen/orleans,ibondy/orleans,jthelin/orleans,galvesribeiro/orleans