fix: keep minor enhancements from #872 (#878)

plugin/source/dynamix.unraid.net/etc/rc.d/rc.flash_backup

@@ -79,9 +79,11 @@ flush() {
   # wait for existing git commands to finish before flushing
   _waitforgitlog "${FAST}"
   logger "flush: ${TASKACTION}" --tag flash_backup
-  # push any changes ad-hoc
-  # shellcheck disable=SC2086
-  echo "${TASKACTION}_nolimit &>/dev/null" | at ${QUEUE} -M now &>/dev/null
+  # if _connected, push any changes ad-hoc
+  if _connected; then
+    # shellcheck disable=SC2086
+    echo "${TASKACTION}_nolimit &>/dev/null" | at ${QUEUE} -M now &>/dev/null
+  fi
 }
 _watching() {
   local flash_backup_pid
@@ -96,10 +98,13 @@ _watch() {
   _clearlocks
   # flush: this will ensure we start with a clean repo
   flush
+  # wait for flush to complete
+  sleep 3
+  _waitforgitlog "${FAST}"
   logger "start watching for file changes" --tag flash_backup
   # start watcher loop
   while true; do
-    # wait for system to be connected to Unraid Connect Cloud, then process flash backups
+    # if system is connected to Unraid Connect Cloud, see if there are updates to process
     _connected && _f1
     sleep 60
   done