A James McArthur strike and Byron Webster own goal put the Latics 3-2 up with just two minutes remaining, but there was more drama to come as Luke Ayling bundled home a last-gasp equaliser to deny Wigan a ninth straight win in all competitions.
"I have never seen more drama, no, that's the way it is," Rosler is quoted as saying by Sky Sports News.
"We got a gift by being 3-2 up and we gave it our all. Normally we defend very well from corners and set pieces and we didn't do that.
"I knew that at one point the run would end, and when that ends with a draw, I take that."
Rosler's side are fifth in Championship table.