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TPS92830-Q1: Output LED flicker at low PWM duty cycle

Part Number: TPS92830-Q1
Other Parts Discussed in Thread: TPS92830EVM, TPS92613-Q1

I am using the TPS92830-Q1 to drive 3 high power LEDs with an external PWM source, and am currently using the evaluation board to test it (TPS92830EVM). However when driving any of the PWM inputs with a low duty cycle (of around 15%) the LED flickers noticeably.

I have examined the jitter on the input PWM waveform and this looks fine at about 250ns, but on the output is around 14us of jitter; see waveforms below:

PWM input jitter:

Output jitter (at the LED output of the driver):

Both waveforms:

What we need is to run the LEDs at low duty cycles with no visible flicker - can you provide some input as to why this might be happening?