never had issue with the Elektron Kit and any of my mono cables although I may have opted for the branded ones, but I believe I tried multing from it quite successfully which would require using third party cables
but I would likely jump for my own cable just because it’s more direct and a little shorter - there’s lots of tips in that thread
maybe some 3.3 mono cables are marginal - I do recall that being an issue with some modular stuff and cheap cables