--- lib/functions.network	2020-02-08 10:48:07.000000000 +0100
+++ lib/functions.network.loopback	2020-03-13 11:19:35.602818930 +0100
@@ -345,7 +345,8 @@
 # Add ONLY IPv4 address (IPv6 address is added automaticly)
 set_up_loopback()
 {
-	if is_yes "$IPV4_NETWORKING"; then
+	# test if addr is assigned already as lxd(lxc?) initializes loopback upfront
+	if is_yes "$IPV4_NETWORKING" && ! ip addr show lo | grep -q "127\.0\.0\.1"; then
 		ip addr add 127.0.0.1/8 dev lo
 	fi
 	ip link set dev lo up