try this

Author: K900

scripts/syschdemd.sh

@@ -50,6 +50,7 @@ start_systemd() {
     --pid=$rundir/ns/pid \
     --mount=$rundir/ns/mount \
     --mount-proc=/proc \
+    --propagation=unchanged \
     nixos-wsl-systemd-wrapper
 
   # Wait for systemd to start