Mr Stansby, 41, from Trimley St Mary died of wounds to the abdomen near Ancaster Road, earlier this month.
So far five people have been arrested in connection with the murder investigation.
Suffolk Police arrested the latest suspect, a 46-year-old man from Ipswich, on Thursday. He was bailed until May.
The others arrested and bailed included a 42-year-old man, a 39-year-old man and a 16-year-old boy, all from Ipswich.
A 31-year-old man of no fixed abode was also given bail until a later date.
A fifth person has been bailed in connection with the fatal stabbing of Dean Stansby in Ipswich.