Volume control from Thunder does not apply correctly

Problem Description

The volume control for weather, in particular, "Thunder roars" described in subtitle, can not be set to desired level. It always play at 100% volume. 

Step to Reproduce

1. Wait or use weather command to change weather to thunder

   /weather thunder 1000

1. Open game menu and select Options...

2. Select Music & Sounds...

3. Set Weather: to 100%

4. Wait for a thunder to occur

5. Drag the Weather to anything but not OFF when thunder strikes

6. Observe that

   1. Thunder continues to play at 100% volume

   2. Dragging to OFF immediately silences the thunder sound

See attachment for a issue demo

Exception

Using command, thunder sound is playing at correct volume.

Step to produce

1. Open menu and set Weather to 100%

2. Use this command

   /playsound minecraft:entity.lightning_bolt.thunder weather @p

1. Open menu and set Weather to 10%

2. Play same command

3. Observe that the sound plays at significantly low volume. Working as expected.

Request Fix

1. Weather setting should apply correctly.

2. Consider special option for user to individually disable sounds, especially for people with astrapophobia

Special Note

I'm not a resource pack expert, but I created the following resource pack attempting to remove the thunder sound.

It failed.

The following is the should index in the 1.14.json file

"minecraft/sounds/ambient/weather/thunder1.ogg":{
         "hash":"671ef0ae7b59014a2f637d7af6d781324ab6309f",
         "size":24468
      },
      "minecraft/sounds/ambient/weather/thunder2.ogg":{
         "hash":"a20cbf2ddce541eaed520d7ec55665fe97428be6",
         "size":25571
      },
      "minecraft/sounds/ambient/weather/thunder3.ogg":{
         "hash":"9ead5c928f9122e3c2f5fc4f6ce7fb4054a2b578",
         "size":27653
      }