No. A quick hand might have hiccuped. And even if the hand wasn't that fast, and Liu Bei still reacted quickly to the situation at hand, it might have been too late.
Let's first understand the situation at the time when Xiang Yu committed suicide. At the time of Gaixia, Xiang Yu had 100,000 soldiers under his command, and he was up against Han Xin as well as the raging Liu Bei reinforcements. It is true that Xiang Yu had portrayed many myths of winning many with few. But most of these myths have a premise, that is, the enemy's defense is slack. But this time, Xiang Yu's army was so well-prepared that it was very difficult for him to escape.
But Xiang Yu chose to take a big gamble in Gaixia, so he fought and lost, and lost big. By the time he escaped from Gaixia, Xiang Yu had 800 of his 100,000 men left. By the time he reached the Wujiang River, Xiang Yu only had 20 people left. Xiang Yu led the last 20 men back to fight, and when he had no strength to fight on, Xiang Yu chose to kill himself.
At this juncture, whether Liu Bei is possessed, or whoever is possessed, Xiang Yu has no room for maneuver. Even if Liu Bei didn't want to die and chose to beg for forgiveness, and Liu Bang didn't kill him at that time. But with a person like Liu Bang who even kills meritorious officials, I guess he will not let this old enemy live a little longer. Even if this Xiang Yu, who is now pretending to be Liu Bei's soul, were to be as skillful as he is, how to show off his pity, Liu Bang would never soften his heart for a single point.
Taking a step back, even if Liu Bei returns to Jiangdong in a small boat, Liu Bang will never lose this great opportunity to kill Xiang Yu. After all these years of dealing with Xiang Yu, Liu Bang knows that Xiang Yu is brave and fierce, so naturally he will not let the tiger return to the mountain. Even if he didn't catch Xiang Yu, Liu Bang will take advantage of Xiang Yu's extreme weakness to attack Jiangdong.