As requested by Garmin-Kevin, here is a separate thread for the following issue:
ISSUE: Hydration Alerts stopped working for no obvious reason!
Those alerts have been working, I cannot tell for sure when it stopped (could be the last firmware update...?)
(Apparently, this is not the first time, that users reported this, also for other watches: https://forums.garmin.com/sports-fitness/healthandwellness/f/vivoactive-4-series/215649/hydration-tracking-no-alert/1241017#1241017 )
Please also look into the other issues with the Hydration Widget:
- Hydration Widget not resetting on new day: https://forums.garmin.com/sports-fitness/healthandwellness/f/venu-2/274568/hydration-not-resetting-each-day
- Hydration Widget Progress Bar not showing: https://forums.garmin.com/sports-fitness/healthandwellness/f/venu-2/271979/hydration-glance-glitch