Pompey have fallen behind in four of their past five League One fixtures, only to win on three of those occasions.
The latest comeback happened at Wigan, with Martial Godo drilling the home side into the lead midway through the first half.
Not that their opponents were behind for long, with Regan Poole quickly levelling before Paddy Lane wrapped up a 2-1 victory.
And although John Mousinho believes his table-topping side can improve, he was thrilled with their character.
The Blues boss said: “I’m thrilled to come to a place like this, face a really decent side and come away with the win.
“There will be times when things don’t go your way, but one of the brilliant things about this group is how they react to adversity.
“When we went behind it didn’t feel like there was any panic. We just addressed a couple of issues and I was confident we’d get back into it.
"The unbeaten run is irrelevant for us – we just want to keeping going out there and winning football matches."
“It wasn’t a perfect performance from us and there are areas where we want to improve, so we need to make sure we stay at it.
“It was a tough, well-earned three points and now all our focus goes to the next game against Wycombe.
“The unbeaten run is irrelevant for us – we just want to keeping going out there and winning football matches.”
Lane volleyed home after being teed-up by Alex Robertson to make it three goals in as many appearances for the Northern Ireland international.
Mousinho said: “He was outstanding at the end of last season and it didn’t go to plan in the summer with the injury he picked up in the friendly at AFC Wimbledon.
“But he’s been excellent since getting back into the side and just seems to get better with every game out there.
“We focused in him being more of a goal threat and he’s one of those who stays behind after training to work on that.”