When fishing, sometimes the "splash" noise when the bobber goes underwater does not exist

As fishing I would throw out the line. I first hear the initial "splash" as the bobber enters the water.

What I expected to happen was to hear another "splash" noise as the bobber went underwater indicated a possible catch.

What actually happened was that the bobber went underwater but there was no noise to accompany it

Steps to Reproduce:
1. Go to any water source with fishing rod
2. Throw fishing rd into water as fishing, listen for initial "splash" sound
3. Wait till bobber goes underwater indicating a possible catch, listen for accompanying sound.
4. If there is no sound you have found the bug