This driver seems to be the only built-in driver that works properly with the IKEA Zigbee CT Bulb that I have. However, recently (since 2.4.0.xxx or C-5 to C-8 Pro migration, both around 12/26/2024) I've noticed a whole bunch of blank log entries for this device.
Also, what's up with the "(dev)" appended to the device name? Is that supposed to be there?
Already flagged to be moved to "Built-in Drivers". My mistake.
Where do you see this?
I see where it says dev:1036 which is telling you it is a device with id 1036 and that has always been like that in the logs.
It's weird... The literal name of the device driver is "Generic ZigBee CT Bulb (dev)". It's a built-in system device driver, I just don't understand why it says (dev) in the device name. I think it was left accidentally during driver development or something. It has been that way for awhile.
The new part is all the blank log entries for this device.
That was its "temporary" name while under development, which then accidentally stayed the name when it moved to production. Now, it's too late to change. 
As for the blank log entries: the only way I could see this happening is if the driver sends some data to the hub that isn't being parsed (switch, level, or CT). If you can provide the debug logs that should appear right before these, that may help narrow down what those are. Otherwise, it doesn't look like any functional impact if that is the concern, odd as it may be...
I'll turn them on and update this post tomorrow after it has collected some log entries.
You might have to go to logs - scheduled jobs and then delete the job to turn off debug logging. So it stays for more than 30 minutes
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