Missing Textures Error when idle in Special Stages.

[overbound]

Fail a Special Stage, wait 10-20 minutes may see this:

############################################################################################
FATAL ERROR in
action number 1
of Draw Event
for object objMissileFire:

Fatal Error: Can not create vertex buffer of size 147456 bytes
5247 vertex buffers allocated with total size of 736384 KB
at gml_Script_draw_billboard
############################################################################################
stack frame is
gml_Script_draw_billboard (line 0)
gml_Object_objMissileFire_Draw_0

The billboard wasn't saved in memory and the game crashed.

[AlexKhayrullin]

I couldn't reproduce this on two PCs with the game running for an hour each time.
Could this issue be made less likely by deactivating all above-ground items as soon as the camera pans down?

One thing I didn't test though is how the game reacts to failing the stage when Metal Sonic wins.