You may be over-working/over-thinking the problem in your specific case with LL here. The next time you successfully connect, edit the connection while it's running: give it a new name, set its preference to allow all users, and to NOT automatically connect, and SAVE the edited connection. The link below describes the more likely cause of your issue. You could just turn off suspend and hibernate altogether.
https://askubuntu.com/questions/1029250/...er-suspend
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https://askubuntu.com/questions/1029250/...er-suspend
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All opinions expressed and all advice given by Trinidad Cruz on this forum are his responsibility alone and do not necessarily reflect the views or methods of the developers of Linux Lite. He is a citizen of the United States where it is acceptable to occasionally be uninformed and inept as long as you pay your taxes.