Aeotec Dual Nano Switch - external change delay

I purchased a bunch of Aeotec dual nano switches (with latest version v2.01 firmware) that when switched using an external switch (regular old toggle), experience a consistent delay of say 500 - 800ms before actually switching.

If I use HA UI, the switching is instantaneous.

Does anyone else experience this issue?

Also the reporting of the change takes another say 1 to 2 seconds to be reported to HA.
Makes light grouping ugly when a set of lights take 2 seconds to change there status after the initial set.