CDJ screen & loop freezing upon hitting loop "out"

Hi all,

I experienced yesterday a problem already encountered earlier, with the 4.01 software version. I basically hit the "4-beat loop" button, then press the "out" one to select a longer length with the strip. What happens is a complete freeze of the screen - I can still play, cue tracks, etc. but the screen remains locked on the loop length menu. And it is impossible to select anything, the needle strip giving no answer. There's no way to close the menu.

I have tried to put another track instead, or recreate a loop, but nothing works. The only solution then is to reboot the player. I cannot reproduce this issue, it simply happens from time to time.

Config: the two players (FW 4.04) are connected to a Netgear switch, and I use Rekordbox 1.5 with pro dj link to communicate with the players through the switch. My laptop runs on Win 7, 64 bits.