Yeah I’ve been using this for over a year, and basically if you cut power to the lights they sync up in under 10 minutes (refresh time) but sometimes it almost seems like it triggers when the device comes online and they update in seconds.
Zigbee are actually way more consistent than z-wave specific to this. My kitchen is 4xZigbee LED cans on dumb switches (the one config I can’t use Inovelli without rewiring ugh) and they are 99% of the time updated within 2 seconds of turning on.