Ipswich Town profited from Axel Disasi’s disastrous mistake to secure their second win of the season.Crystal Palace controlled the affair and were good value for their lead after 14 minutes when Anan Khalaili capped an incisive move with a delightfully drilled finish into the bottom corner.Against the run of play, though, Ipswich got back into the game when the Palace backline switched off, allowing Leif Davis to cross from the right with Emersonn on hand to guide a free-header past Walter Benitez. The defence had completely stopped – Ipswich were able to open Palace up far too easily.Palace continued to look comfortable, though, until Disasi was late on Jack Clarke in the middle of the park, flying over the ball with his studs up and catching Clarke on the shin.Dismissing the centre-back was a simple decision for referee Chris Kavanagh, leaving Palace to defend for 55 minutes with 10 men.Ipswich had been dull but the red card sparked them into life and before half-time they had taken the lead.Emersonn’s miscued attempt fortuitously struck his shoulder and fell for Davis at the far post, where he was free to head past Benitez.There was a retreat in the second half, though, and O’Neil needs to be wary of that and breed greater consistency into his side’s performances.They allowed Palace, feeding off the crowd, back into the game as Jorgen Strand Larsen shrugged off Issa Diop to get a shot away from just inside the area and drill it past Kjell Scherpen.Palace were in the ascendancy and the impetus had swung in their favour despite being a man down.Khalaili, who had scored his maiden Palace goal in the first half, should have wrapped up three points when he skied over the gaping net from just a few yards out shortly after the equaliser.They made Palace pay for that miss when the clock struck 90 minutes. Davis latched on to a cross from deep and headed towards goal. His attempt struck the crossbar but dropped kindly for substitute Zian Flemming, whose scuffed contact secured all three points. Zian Flemming scored late-winner against ten-man Crystal PalaceAll things considered, it has been an impressive start from Gary O’Neil’s side. This was the first time Ipswich had come from behind to win in the Premier League since beating Tottenham Hotspur away in December 2001.Yes, they have lost twice, but those defeats came against Liverpool and Manchester United.The reality is that they are beating the middling clubs they need to if they have any chance of staying up.In fact, their two wins in four games have come against two of the Premier League’s three Europa League representatives, following their victory over Sunderland on the opening day.Palace, though, should be apprehensive considering their defence’s dismal start to the season.Pierre Sage’s side have shipped 11 goals in their first four Premier League games, and the inconsistency of the backline is not helping, with the starting back three changing in every game.They did have 10 men for just under an hour on Saturday, but basic errors and moments of lost concentration had been prevalent in the previous games, too.For Ipswich’s first goal, the defence expected the linesman to raise his flag for offside and froze, gifting Ipswich a lifeline.Pre-empting the whistle would be deemed criminal on a school playground, let alone in elite football.Most worryingly for Palace, Sage conceded in his post-match press conference that his players had made the same mistake in training this week.There is no stability; Jaydee Canvot was dropped from the squad completely after one bad game. How can Sage expect his backline to gel? Meanwhile, Palace have not kept a clean sheet in their last 10 Premier League matches – the problems precede Sage but he has shown little sign of finding the answers.