Problem I2C NACK in 3rd byte MLX90614 - Repeated Start
It is hard to tell without being zoomed in further, but it looks as though you may have inadvertently sent a Stop immediately after the Repeated Start. SDA looks like it went high a little bit before SCL went low. This would certainly prevent the slave from ACKing.

The first Start has the same behavior, but it looks like it wasn't quite as bad and so wasn't perceived as a Stop.