Naturally generated lava causes memory leak / excessive RAM usage

Steps to reproduce:

• Create a new world with seed 8104515, creative, simulation distance 6

• Teleport to 0 90 -735 in the nether (/execute in nether run tp @s 0 90 -735)

• Observe Minecraft memory usage (My base memory usage in tests started at 1.7gb)

• Stay in area and let world run for 1 hour

• Observe Minecraft memory usage (Frequent spikes in memory usage in excess of 5gb)

Expected result:

• Minecraft stays near baseline memory usage (1.7gb)

Actual result:

• Minecraft has excessive memory usage, frequently fluctuating from 2gb-5gb

Additional information:

• This appears to be caused by a naturally generated lava source created at world generation located at -4 107 -735

• Removing the lava source does not remove all the child lava created by the source and memory issues persist

• World size increases to 200mb after 1 hour of playtime

• This effects any player that has loaded this area in the nether

• When any player loads the nether, even when not local to this area; fluctuations in memory usage are observed

• Excessive memory usage can be stopped by deleting a 4x4 chunk area centered around this lava source, encompassing all child lava flows

• Memory leak will return after regeneration of this area

This bug would be extremely difficult for the average Minecraft player to identify and can be world ending. On a multiplayer server, this bug is amplified by each player who has loaded the effected area; leading to server instability and crashes.

Attached to the bug report is a screenshot of the high RAM usage, pictures of the suspect lava, and a 1 hour test of the world from new where I stayed in creative in the nether at this location.