changing in address list

hi guys
recently after using Cisco IP SLA with Mikrotik on one side (to create 2 link failover), I noticed that sometimes my route get unreachable after diagnosing I figured that the problem is in the address list.
one of my routes IP address interfaces change to eth1(“AP 1”) automatically caused my route be unreachable (it’s very weird )

(also, I created a loopback bridge to assign my public IP addresses)
could you plz help me on this

Update: when the router OS rebooted this changes happened.
Update2: after changing “AP 1” to “AP1” it seems the problem is solved. :confused: