Large bundles caching problem

My team is facing problems with large bundles caching in web player. Small bundles (about 7 Mb size) are cached with no problem, but bundles of 30 Mb size are not cached into Shared Cache, though it is less than 50 Mb available. Is there any restriction on cached bundles size? And if there is not, what could be a problem? We use Unity 5.3.2f1.