HomeKit bulbs not keeping state

So I bought some athom HomeKit bulbs by mistake, thinking they were Home Assistant/Tasmota bulbs… anyway, that’s not important. What’s important is that I have got them paired with the HomeKit Controller integration in HASS, and all seems okay, except for the fact when I turn off the bulbs at the switch and back on again, it does not remember the last state it was in, and reverts to 100% brightness + white.

This is very very annoying.
Just wondering if this is a fault with the bulbs, or if there is anything I can do within the integration or HASS. Or is this a limitation of HomeKit w/ HASS.
Otherwise I will probably return and get the correct bulbs.

Seller gave me an updated firmware which resolved the issue. However the bulbs still report as 100% brightness white light inside home assistant, regardless of what actual state the bulbs are in. Any ideas to solve this?