hi Hilbert, thanks for reply, even if it is late 😉
i have a wifi access point used only for my layout, in the same room…
i did not find where the problem come from, so i decided to stop using MLC
i sold most of my switches and motors, and i made a more simple train layout with 2 trains running…and lots of trains in waiting areas
automation is finish for me
but thanks for reply
David