Title is a little misleading, 8.90.5 bugs? maybe
The first bug is actually already fixed for the next version by enabling ‘wait for network before starting kodi’ in CE-settings. You are right in that it is a race condition but as soon as the network connection is active it restarts the remote communication server anyway so there is no issue for the end user other than the message.
As for the second bug report there is a delay whilst wireless networks are scanned, this is normal behaviour.
Thanks for reporting the issue.