Products of the category are lost when changing the image

[fsilvarincon]

I have a category with about 37,000 products, simples and configurables, which contains other three subcategories. When I change the image of the category, I lose most products, they are reduced by 5000.
I have increased the PHP memory_limit to 2G and the post_max_size to 128M, also added the directive max_input_vars = 50000.

I do not know what may be happening, if someone has had the same problem I would be very grateful if you post any help.

My version of Magento is 1.7.0.2

[fsilvarincon]

problem solved.
Although the associated products appeared in the categories, in the file of each product it was not associated with any family, it seems to be a problem of corruption of the indexes of entities in the allocation between products and categories. Another error in the relationship management of the Magento 1 database.