Shruthi-1 - Special Functions in Browse Mode don't work

Hi all

I just got an assembled Shruthi-1 last week and despite it seems to be fully working, I am unable to access the special functions that allow me to initialise patches and send the current content of programs and sequences by Sysex to the computer.

The buttons seem to work well by themselves, but when I press S6 to access the browse page and then S6 and S4 together, nothing happens…
I even keep both pressed for a while.

Can this be a problem related with the building of the unit?
Or what can I be doing wrong?

Thanks in advance,
All the best