Is it necessary to go through immigration when doing a same-day border bounce from Phuket to Kuala Lumpur?

When making a same-day return trip from Phuket to Kuala Lumpur (KL), it's necessary to clear immigration upon arrival in Malaysia. Travelers cannot bypass the immigration process, meaning they will be required to get stamped in upon arrival and then stamped out before departing back to Phuket. While some commenters noted the efficiency of the immigration process in KL, others shared personal experiences that indicated varying outcomes based on individual circumstances and visa types. For those on specific visas like the NON-O, it's advised to ensure compliance with immigration rules to avoid potential re-entry issues.