Sengled Zigbee bulbs not responding to flash command

I have a number of Hue and Sengled Zigbee bulbs.

I’ve been trying to get the flash command working, and realized the Hue bulbs will flash as they should, but the Sengled bulbs only turn on.

Is there anyway to troubleshoot this further? According to the device properties, they should support it.

Command I use in NodeRED for group that contains both bulb types: