@Solla-topee  thanks for the reply.

here is a short video showing the problem.

the first lights to lit are potlights which work fine.

The second set are the pendent lights which have the problem.

you can clearly see the burst of light when they turn on and then go to the intensity setting.

they do the sepame thing when they turn off.

@Solla-topee 
It looks the same as on my KS220M - all fine on all HS220. Only happens on dimmer switches. Probably you should limit dimmers from going lower than programmed minimum. I believe it could be fixed in software. Thank you

@Solla-topee 

i cannot change the bulb. The led bulb is fixed to the pendent light...

they are manufactured by Litonia lighting.

https://www.lightingdirect.com/lithonia-lighting-mdpb-m6-3-led-mini-pendant-bullet-fitter-fitter-only/p1952104 

the spec sheet is here: https://s2.img-b.com/lightingdirect.com/mediabase/specifications/lithonia_lighting/607505/lithonia-lighting-mdpb-m6-specsheet-80.pdf

@Goldbug 
There is possible work around, try to flip a power breaker for the line with a troubled switch for 30sec. There is a chance it could resolve light burst issue in meantime. Switch reboot button will not work in the same way.

@Yokushka 

flipped off the breaker for 30 seconds plus, flipped it back on... no change, lights still flicker when they turn on...

i understand Tp-link has opened a ticket for this problem, they will investigate this further.

@Goldbug 

update...

Exchanged a few emails with someone at TP-link support about this problem with my lithonia led pendents.

No solution to my problem.

They suspect an incompatible led buld. The problem is that the led bulb is part of the fixture and cannot be replaced.

Was told they continue to discusse possible solution.

my interpretation is that they will not fix my problem... ☹️☹️☹️