After installation latest firmware arp and seq not running any more.
Same thing happened to me today when I upgraded to firmware 1.4, arp and seq not working.
Did you get them working again?
Did you switch the clock to internal? My clock was set to Auto, and Auto detected Analog as source, even nothing was connected to clock in.
Can confirm the same after 1.4
Tried internal clock but still no arp nor seq
Returned the muse.