Six minutes later the hosts went up 2-1 again from Mason-Smith who scored an opportunistic goal when he dutifully followed up a drive from centre-mid Ross Willox from 25m out but Tasman goalkeeper Thomas Fawdry fumbled in front of the goalmouth.
Bay United extended that lead to 3-1 in the 19th minute when former player Scott Gannon, an Aussie, tripped Argentine striker Facundo Barbero in the 18m box.
Referee Anne-Marie Keighley instantly pointed to the spot but Fawdry thwarted Bay top goal scorer Saul Halpin's penatly kick although the English striker pounced on the deflection to slot it into the net.
Keighley then ran to her assistant, Ashton Davenport, who had his flag up. After some deliberation she awarded the penalty-kick goal to Halpin amid suggestions the goalkeeper had moved over the line before the kick was taken although Tasman coach Richard Anderson howled on the sideline at fourth official Anthony Riley.
Leftback Fergus Neil, in place of Kohei Matsumoto who has jetted back to Japan because of an illness in the family, almost scored a goal on the stroke of halftime but his shot from 23m out hit the crossbar and jagged back into play over the line.
At halftime, Bay United coach Brett Angell, serving a four-match suspension with homeboy Corey Chettleburgh in the stand, held a brief discussion with acting coach Jamie Dunning.
But it was the visitors who took advantage of Ifill's decision to play into the stiff wind in the first half when they scored a superb goal to make it 3-2 in the 52nd minute.
Rightback Cameron Lindsay made an oblique cross from the grandstand side of the park, about 45m out, to inside the 18m box on the left flank where Marowa deftly volleyed it with his right foot inside the far right upright despite a desperate dive from Hill.
The visitors mounted several raids at the Bay United goalmouth with the wind behind them but the resolute home defence hung in for a valuable three points to remain tied in fifth place.
