IBController retrieves futures' expiry dates different than shown

IBController
,
#1

Does anyone know if this is normal behaviour? The futures expiry dates that IBController reads are sometimes different than those shown in the app itself

Thank you

//read tickers IB format
#include <TickersIB.afl>  // var: tib

//start interface
ibc = GetTradingInterface("IB"); 
	
//if connected read data
if ( ibc.IsConnected() )
{			
	ibc.sleep(1000);  //need to wait for TWS otherwise doesn't read anything
	Expiry = ibc.GetPositionInfo( tib, "Expiry");
}

Filter = Status( "lastbarinrange" ); 
AddColumn(Expiry,"Expiry",1.0);

z140

#2

@Armin_Tamzarian - I could not find this documented either. For the ES, the official expiry date from the CME the 2021-09-17. If I had to guess, 2021-09-16 might be the last date that IB allows you to trade it.