Internal Keyboard+Trackpad freezes while waking from Sleep - MBP 13 inch 2019 - Searching for bluetooth keyboard pops up - Changed New Internal Keyboard - Reset NVRAM + SMC multiple times

My MBP 13" late 2019 built in trackpad and keyboard stops functioning abruptly. It has been working fine and intermittently it stops all of a sudden. The problem generally happens when the computer wakes from sleep. The problem also happens intermittently once in few months and then just goes away. During the problem, the trackpad and the keyboard both do not work and freezes. Also a pop up window appears that the MBP is searching for 'Bluetooth Keyboard and it is not found'. Whereas no such keyboards are connected. After few seconds of freezing, automatically the pop-up goes and the MBP starts working. I have taken to Apple Service and they thought that the problem is with butterfly keyboard may be and have changed the keyboard. However, the problem of searching bluetooth keyboard persists. I do not use any bluetooth keyboard or mouse. Mac OS Catalina 10.15.4 is OS. The MBP is just few months old bought in Dec, 2019. The searching of bluetooth keyboard is driving me crazy. Also I have tried resetting NVRAM+SMC. No help with that. Please help as Apple Service is also not being able to answer regarding the issue.