Weird string argument behaviour

public async messageRun(message: CardinalCommand.Message, args: CardinalCommand.Args) {
        await args.repeat('url', { times: 50 }).catch(() => null); // remove urls from the message
        const isAfk = await this.container.db.afk.count({
            where: {
                memberId: message.member.id,
                guildId: message.guildId
            }
        });

        if (isAfk !== 0) {
            return sendTemporaryMessage(message, {
                embeds: [new CardinalEmbedBuilder().setStyle('fail').setDescription('You are already AFK')]
            });
        }

        let afkMessage = (await args.rest('string').catch(() => 'AFK')).slice(0, 250);
        return await this.goAfk(message, afkMessage);
    }