Objects with custom textures disappear and got massive laggs

[~~|Tampon)]

Since the latest patch/update my MTA doesn't work probably anymore. I have some custom textures for my vegetation in the gta3.img. Just for having a higher resolution. After the update I'll get massive laggs while entering a server or my mapeditor. After waiting for some time most of the trees in the gta world disappered. Some of them got the original texture back and some keep the custom ones. I don't really understand this order. Anyways I hope this will be fixed soon.

[ccw]

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[~~|Tampon)]

https://pastebin.mtasa.com/548900386

[ccw]

Thanks. This should be fixed soon

[~~|Tampon)]

I just have a question: I've got another patch today. But it still doesn't work. So this wasn't the fixing patch for this problem yet, right?

[~~|Tampon)]

Update:
While the issue isn't fixed yet, I had to remove all the custom vegetation texutres... I still have mipmapped textures in my gta3.img but I've figured out that every object loads fine except the objects from the area51 which contains textures from the "a51_ext.txd" and "a51.txd". They still won't load the objects and give me massive laggs.

[~~|Tampon)]

Why is it still not fixed after the 1.5.6 update? :(