Drawing too much lines results in a bug

[InsOp]

Hey dear PixiJs community,

I have this loop:

map.mapGridWidth = 54;map.mapGridHeight = 100;game.gridSize = 64;game.gridUI = new PIXI.Graphics()game.gridUI.lineStyle(2,"0x"+colorNameToHex("green"), 0.4)for (var x = 0; x < map.mapGridWidth; x++) {    for (var y = 0; y < map.mapGridHeight; y++) {       game.gridUI.drawRect ( x * game.gridSize - game.offsetX, y * game.gridSize - game.offsetY ,            game.gridSize , game.gridSize  ) ;    }}game.fgContainer.addChild(game.gridUI);

With map.mapGridWidth = 54 everything runs smooth, but as soon as I change it to 55 Ill this diagonal line:

(the other squares are expected)

(note the green diagonal line!)

(and suddenly it stops drawing the rest. the diagonal line ends here, but hard to

see with the naked eye)

 

that means that between 5400 and 5500 ill get this bug.

perhaps pixijs isnt meant to be used like this and i sure could

do it more elegant (only draw those lines which are actually in the visible screen).

but for the sake of research i want to find out what i can do other than that.

 

btw i need dimensions like 

map.mapGridWidth = 317

map.mapGridHeight = 172

and the result atm looks like this

 

so I need a little help here