Is there a ”dark shadow” in the approval rating of candidate Lee Jae-myung? ... ”Down” from the previous election = South Korean presidential election

On the 22nd, 13 days before the June 3 presidential election in South Korea, it was announced that Lee Jae-myung, the main opposition Democratic Party candidate, was still leading the presidential candidate approval rating survey.
However, the results of a public opinion poll showed that approval ratings had "dropped" compared to the previous survey.
The South Korean polling agency Realmeter conducted a survey of people aged 18 and over on the 20th and 21st of this month.
In a survey of 1,012 voters on the approval rating of presidential candidates, Lee recorded 48.1%. Kim Moon-soo of the ruling People Power Party followed with 38.
The top 100 candidates were Lee Jun-seok of the New Reform Party with 9.6%, Lee Jun-seok of the New Reform Party with 9.4%, while 1.3% chose "no" and 0.8% chose "don't know."
Realmeter reported the results announced that day, "Candidate Lee Jae-myung said, 'Coffee costs 120 won.'
His comments on "The Economy of the Hotel" and "The Economy of the Hotel" became controversial, and he was attacked by candidates Kim and Lee Jun-seok in his first TV debate. He also lost support from some regions, those in their 60s, and the self-employed.
"The drop has been continuing for two consecutive weeks due to the fact that former President Yoon Seok-yeol recently left the party, and former Daegu governor Hong Jun-pyo has also left the party," he added.
The support declarations and campaign tours by Mayor Lee Dong-hoon and former ruling party leader Han Dong-hoon, as well as the accelerated discussions on "unifying" with candidate Lee Jun-seok, have rallied conservative voters and attracted independent voters.
Meanwhile, in a hypothetical two-way battle between Lee Jae-myung and other candidates, "Lee Jae-myung got 50.3% and Kim got 43.4%.
% for Lee Jae Myung, 49.5% for Lee Jun Seok, and 37.7% for Lee Jun Seok. However, the gap between the two candidates this time has narrowed since the previous survey.