The Lions travelled to Suffolk on the back of a sparkling 13-match unbeaten run which lifted them into the play-off places.
But they came unstuck at Portman Road as lowly Ipswich ran out convincing 3-0 victors, and will now look to get back to winning ways against Leicester next weekend.
"Games like that can go either way very easily - but we have been winning those type of games lately," said Jackett.
"We have been the ones with the dominating centre-backs and we have had the forwards that have been causing all the problems.
"Ipswich found an intensity with over 17,000 people behind them and we needed that in the first half to get something to build on.
"We kept going and kept battling but we couldn't quite find the breakthrough."