Before my workout, my hydration goal was 97 oz, and my current hydration was 106 oz.
About 5 minutes after my workout, I opened the hydration widget, and with the screen still showing 106 oz and 97 oz, I pressed the "12 oz" button, and nothing happened for about 5-10 seconds, while I waited patiently. Then suddenly my hydration dropped to 36 oz, and my goal increased to 120 oz.
Note that I do not make any hydration edits in the Connect App or ever even open the hydration in Connect app, because the hydration syncing is a disaster. But something is still seriously wrong with this widget.