WP RSS counting up

WP RSS is acting wierd.
I created a new environment with latest WordPress 5.6.2 en Latest WP RSS 4.18.
Whenever I add an RSS the counter starts counting up! instead of down.
I have no clue what is going on.
In de database it seems that the recurrence info is missing from the created cron task.
I’m sure I must be doing something wrong, but at the moment I have no clue.

i: 1605889493;
    a: 1: {
        s: 28: "wprss_fetch_single_feed_hook";
        a: 134: {
            s: 32: "499579a8c627f951ddcbf563c5155c9e";
            a: 2: {
                s: 8: "schedule";
                b: 0;
                s: 4: "args";
                a: 1: {
                    i: 0;
                    i: 733044;
                }
            }
            s: 32: "4fa5cf8cd2d9d2e396ed41ec6e0d3ae6";
            a: 2: {
                s: 8: "schedule";
                b: 0;
                s: 4: "args";
                a: 1: {
                    i: 0;
                    i: 716936;
                }
            }