Hey there! @sscoop, Welcome to the community! Sorry to hear you having trouble with STHM.
Performing a Reset inside ‘STHM’ or Deleting and re-adding the STHM in the ‘Life’ Section will not remove automation, scenes, or smart apps. Elaborating further, already setup automations are affected when a device used in the automation is removed completely from ST.
I always recommend checking the Automations tab on the Device tile. This will list out any automation associated with the current device so in the event the device is removed, the listed automation(s) would be affected.
I assume I will have to set up the actions/responses for the STHM for the security, leaks, and smoke sections of the STHM. Please confirm.
Will those three sections come back automatically?
Yes, you are correct in the assumption of having to reconfigure the action once a reset or Deletion of the STHM has occurred. You will be prompted to re-configure the actions for Security, smoke, leaks,and the notifications associated with each response from confirmed events(Hoping that your new water sensor shows as a leak sensor in the reconfiguration process). These will not return automatically as privacy protection since most utilize responses to specific push notifications to members or mobile numbers.
I hope this message finds you well!