Diceparser not working with webhook

[sighac]

Hi.
Dice commands sent to a webhook used to work before the Discord slash command change.
For example, a "!1d20+2 # my roll" was catched by Diceparser and interpretated on the fly.
Now, even with a command that works copy-pasted in Discord, like "/roll command:1d20+2 # my roll", when sent to the webhook the Diceparser remains idle.
answerbot is "on" in the bot configuration.

[Conf] Server Configuration:
prefix: --
displayMode: markdown
notifyuser: none
answerbot: on

Thanks.