Released reserve item not spawning properly while 20-21 sprites are on-screen at once in SA-1 ROMs

[Anas13303]

I discovered this one a few days ago. Basically, if you have a reserve item in the item box and there are around 20-21 sprites on-screen (or if 20-21 sprite slots are taken up), then the moment the reserve item is released, it will either cause random sprite tiles to disappear temporarily for a few seconds while spawning nothing, spawn a bogus glitched sprite, or both. Thankfully, this issue can be fixed by going to line 454 in 'powerup_files/item_box_engine.asm' and changing the 0B to 15.