Synthesizers

I want to do fm with the asdr, but even with all potis fully down, the pitch starts high and takes about a second to get down.

Is this broken, is it a quirk of the 2600?

Ideally, I would want it to stay flat if all potis are down.

My intent is to generate a similar effect to the lag but much shorter.

Edit: I tried the same with the Arturia 2600 VST, that one behaves as expected.