Lee, who made the cut in tenth position in the overseas pool last night with 1225, was knocked off into the mixed pool after another left-hander, Syaffique Ikhwan of Malaysia took over the lead with 1366 in today's opening qualifying squad.
At the same time, Lee improved his lower 3-game series with a stunning 769 to take over the lead from the Malaysian with 1414. But soon after, overnight leader and PBA-World Bowling Tour Thailand champion, Yannaphon Larpapharat of Thailand also improved to grab the lead with 1446.
Lee slipped to second as Yannaphon's team-mate and PBA-WBT Busan Cup champion secured third spot with 1404. On his fourth attempt, Lee posted 237, 238 and 214 for a 689 series to regain top spot with a 6-game tally of 1458.
Hong Kong's Ernest Kwok, who sat in the top 3 bracket briefly, missed the cut in fourth position with 1400. His team-mate and 2017 Philippine Open first runner-up, Mike Chan completed the top 5 with 1373.