Ram usage being too high and game freeze completely

[mat-del711]

So i spawn in a world take a drone and try to place it on the ground, it doesn't have the time to appear
my fps go to 0 instantly and the game freeze and the console say this :
[17:31:34] [Server thread/INFO]:Saving and pausing game...
[17:31:34] [Server thread/INFO]:Saving chunks for level 'ServerLevel[New World]'/minecraft:overworld
[17:31:34] [Server thread/INFO]:Saving chunks for level 'ServerLevel[New World]'/minecraft:the_nether
[17:31:34] [Server thread/INFO]:Saving chunks for level 'ServerLevel[New World]'/minecraft:the_end
[17:31:34] [Server thread/INFO]:Saving chunks for level 'ServerLevel[New World]'/lostcities:lostcity
[17:31:34] [Server thread/INFO]:Saving chunks for level 'ServerLevel[New World]'/the_deeper_void:void_dimension
[17:31:34] [Server thread/INFO]:Saving chunks for level 'ServerLevel[New World]'/the_deep_void:deep_void
[17:31:34] [Server thread/INFO]:Saving chunks for level 'ServerLevel[New World]'/the_deep_void:the_pit
[17:31:55] [Render thread/INFO]:[System] [CHAT] You reached 90% memory usage, showing leaking objects so far...
[17:31:55] [Render thread/INFO]:[System] [CHAT] B: 11657MB / C: 15210MB / Diff: +3553MB
[17:32:06] [spark-java-sampler-0-0/WARN]:Timed out waiting for world statistics
[17:32:25] [ModernFix integrated server watchdog/ERROR]:A single server tick has taken 40002, more than 40000 milliseconds