rfbsl starts only if * button is pressed after delay

Lets imagine I want to start rfbsl mode and do an update:

1. In L2 I press "#" a couple of times to reach "rFbsl".
2. I press "DOWN" and get "open" in the display *
3. I long-press "*" to activate but nothing happens

But when I wait 3-4 seconds before long-pressing "*" it runs!

[robomotic]

Hmm that's strange in my firmware version is the '#' button.