Minified files blocking waterfall (wordpress and W3TC)

Im using W3TC with minify

Im detecting that css and js minified files takes a lot to load, blocking the following elements in the waterfall.

If i use other minification plugin, like head cleaner, those minified files load instantaneously with no blocking at all

Regular uncompressed css and js files are loaded with no blocking nor waiting neither

I don know if the problem is related to number of files minified (can i limit the number of files to minify?) or its related to not limiting the number of characters in file name. Could this really be an issue loading minified files?

Here is an example of the tests:

http://ift.tt/1HprW48

Since i have no clue, any approach would be awesome

Thanks and best regards