I can verify similar issues with tp-link devices. The ones that I have that trigger rules work within 1-2 seconds most of the time but every once and a while can take a 1+ minutes to trigger. It’s not consistent, but it’s been observed. Similarly, something is strange enough with the tp-link refreshes that mutual “follow” profiles with tp-devices, which apparently should not create loops
do, in fact, create loops resulting in some truly bizarre lighting displays.
It’s never been a priority for me to track down, so I’ve never implicated my chromecast binding, but I might be able to do some testing in the near future and see.