Phantom sounds carrying over between levels

[RingtailRaider]

Describe the issue
Entering a level near the start of the game may cause some looping sounds from the level to play in any later levels opened, despite the source of the sound being nowhere nearby. They will play even if their location is hidden or inside solid rock. Pausing the game causes the sound to end and not return.

This happens most frequently with lava bubbling, after entering Driller Night. This will cause lava bubbling to appear somewhere in every level. The location on the map seems to vary, but it is usually in roughly the same area in each map, and is (almost) always somewhere in the southeast quarter of the map.

This bug has also been encountered with the Small Digger's engine sounds in Explosive Action. However, this one seems to be related to the camera's starting position.

#44 may be the same bug.

Steps to reproduce

For the lava bubbling, enter Driller Night! upon starting the game, then enter other levels. This may not always trigger the bug. Once the bug is triggered, it will occur in every level upon starting it. The lava bubbling sounds have been heard in the following locations:

• Tutorial 7: Drilling With Vehicles -- In the rock just northeast of the Support Station.
• A Breath Of Fresh Air -- On the south side of the lake in the eastern cavern.
• Explosive Action -- 2-3 blocks south or east of the Tool Store.
• Search 'n' Rescue -- On the river if you go directly north from the base towards the central cove.
• Breathless -- 5-7 blocks south or east of the Tool Store.
• Frozen Frenzy -- The southwest corner of the heavy landslide cavern.
• Water Works -- In the water between the central and southeast "islands".
• Rock Hard -- In the rock near the southern end of the starting cavern.
• Split Down The Middle -- At the southeast corner of the destination cavern.
• Lava Laughter -- In the crystal seam on the north side of the larger cavern south of the base (on the right side of the symmetry). This location appears to break the pattern, as it is located just barely in the southwest side of the map.
• Hot Stuff -- In the center-right path just after it forks from the far-right path.
• Rocky Horror -- Behind the recharge seam in the small southeastern cavern.

For the Small Digger engine sound:

1. Enter the level Explosive Action
2. Quit the level
3. Enter the level Breathless
4. Move to the east (northeast from how the camera is angled) to where the cavern is one block wide

The Small Digger has also been heard in the central "island" in Water Works, and just northwest of the base in Lake Of Fire.

Additional information

• Time played this session: Varies
• Level: See above
• Game speed: 100%-300%
• Graphics fix: dgVoodoo 2.79.1, also happens with no graphics fix
• Using mods: None