There is an issue when force-up knob is configured. This issue happens when the physical or AE interface are disabled and then device is rebooted. After device becomes up interface shows up under <show interfaces mc-ae> although it should be down.
Below are 2 aggregate ethernet interfaces ae0 and ae1. ae0 is configured with force-up under one of its physical interfaces.



{master:0}
user@qfx> show interfaces descriptions
Interface       Admin Link Description
xe-0/0/6        down  down  em1
xe-0/0/7        down  down  p1p1
ae0             up    down -bond0 >>>>> interface is down 
ae1             up    down -bond1
ae52            up    up   LEAF_B2B_QSFP_link
irb.500         up    up   ICCP


{master:0}
user@qfx> show interfaces mc-ae
 Member Link                  : ae0
 Current State Machine's State: mcae active state
 Configuration Error Status   : No Error
 Local Status                 : active
 Local State                  : up >>>>>>>>>>>local state is up
 Peer Status                  : active
 Peer State                   : up
     Logical Interface        : ae0.0
     Topology Type            : bridge
     Local State              : up
     Peer State               : up
     Peer Ip/MCP/State        : 3.3.3.2 ae52.0 up


 Member Link                  : ae1
 Current State Machine's State: mcae active state
 Configuration Error Status   : No Error
 Local Status                 : active
 Local State                  : down
 Peer Status                  : active
 Peer State                   : up
     Logical Interface        : ae1.0
     Topology Type            : bridge
     Local State              : up
     Peer State               : up
     Peer Ip/MCP/State        : 3.3.3.2 ae52.0 up




user@qfx> show configuration | display set | match ae0
set interfaces xe-0/0/6 ether-options 802.3ad ae0
set interfaces ae0 description -bond0
set interfaces ae0 native-vlan-id 2012
set interfaces ae0 mtu 9192
set interfaces ae0 aggregated-ether-options lacp active
set interfaces ae0 aggregated-ether-options lacp periodic fast
set interfaces ae0 aggregated-ether-options lacp system-id 00:01:02:03:04:00
set interfaces ae0 aggregated-ether-options lacp admin-key 100
set interfaces ae0 aggregated-ether-options mc-ae mc-ae-id 100
set interfaces ae0 aggregated-ether-options mc-ae redundancy-group 1
set interfaces ae0 aggregated-ether-options mc-ae chassis-id 0
set interfaces ae0 aggregated-ether-options mc-ae mode active-active
set interfaces ae0 aggregated-ether-options mc-ae status-control active
set interfaces ae0 aggregated-ether-options mc-ae init-delay-time 240
set interfaces ae0 aggregated-ether-options mc-ae events iccp-peer-down prefer-status-control-active



user@qfx> show configuration | display set | match ae1
set interfaces xe-0/0/7 ether-options 802.3ad ae1
set interfaces ae1 description -bond1
set interfaces ae1 mtu 9192
set interfaces ae1 aggregated-ether-options lacp active
set interfaces ae1 aggregated-ether-options lacp periodic fast
set interfaces ae1 aggregated-ether-options lacp system-id 00:01:02:03:04:01
set interfaces ae1 aggregated-ether-options lacp admin-key 1
set interfaces ae1 aggregated-ether-options mc-ae mc-ae-id 1
set interfaces ae1 aggregated-ether-options mc-ae redundancy-group 1
set interfaces ae1 aggregated-ether-options mc-ae chassis-id 0
set interfaces ae1 aggregated-ether-options mc-ae mode active-active
set interfaces ae1 aggregated-ether-options mc-ae status-control active
set interfaces ae1 aggregated-ether-options mc-ae init-delay-time 240
set interfaces ae1 aggregated-ether-options mc-ae events iccp-peer-down prefer-status-control-active

After device becomes up interface shows up under <show interfaces mc-ae> although it should be down as its underlying physical interfaces are down.

The issue here is due to the wrong usage of force-up. force-up configuration on MC-AE node must be under aggregate ethernet interface itself not one of its child interfaces. force-up under physical interface on MC-AE node is not supported.