The latent memory of LED fairy lights

[GoodKingSlubbersArseFellOut]

Who else does this of an evening?

switch on at plug
find little green box
depress button repeatedly
move through fade,slow twinkle, quick twinkle, on-off on-off, vegas spactacular etc until at the end you get to static.

AND THEN
one day you switch them on at the plug and they just turn on at static, no button depressing required

BUT THE NEXT DAY
back onto random.

Why is this? How can this be? How can they remember some days but mostly just be annoying?

lol

do you have mice that play with them in the night?

No mice (I hope).

It is so odd. If I had to press the button every time I switched them on I'd understand.