I took a water bottle and tried to fill it up at a natural water spring on Sakhal. Filling up the bottle stops unprompted shortly after the animation starts even though i held the button. I had to try about ten times with different positions till it worked. Sometimes it filled up a little then stopped again.

Tried canteen and plastic bottles on 3-4 different springs. When you change the position of you character often enough you can find one where the bottle filling doesn't get interrupted. Best place i found so far is slightly outside the spring standing up.

To reproduce just try for yourself with a bottle on a spring several times.

UPDATE:

• I tried to reproduce it at around 10-15 springs and only few have this problem. Most work fine except for when your bottle goes somehow into the spring structure while filling up (see clip 1).

• The spring where the issue is most apparent is located south of Matrosovo (x:143/y:047). For this see clip 2. The one directly at Matrosovo had similar issues but not as bad.

No sudden and unprompted interruptions while filling up water bottles.