how to understand SMBus SDA line captured waveform
It looks like the address 0x16 sent by master is correct because 9th bit that is slightly higher than other low bits is the ACK from slave. But then something holds SCK low. It might be the slave that holds it low until it is ready for next byte. Or it might be the master that is unable to send next byte because of software error. The waveforms are quite noisy and glitchy so make sure it is not a signal integrity issue.