I assume this thread has not been solved. If it has been solved, please start a new topic. 
If you meant "not Cloud flashing" then yes, several things have changed which might be affecting your projects. Just yesterday, I tripped myself up by not following relatively new guidelines in using Workbench and CLI. Here are some posts with good explanations with what has changed and could be affecting you:
https://community.particle.io/t/issues-compiling-locally-and-on-the-cloud/64759
https://community.particle.io/t/sending-additional-files-to-cloud-compiler/64733
In my case, I was sending TOO MANY, or, irrelevant files to the cloud which caused an error. So, for every project I add to my workspace two files:
particle.include
particle.ignore
This ignore file allowed be to keep copies of libraries in my file structure and NOT use them for cloud compile or cloud flash to the cloud. (e.g. lib-old, lib-old2, lib 2, etc.)
https://community.particle.io/t/issue-cloud-compile-fails-but-local-compile-succeeds/64878/5
Sometimes I make a change to a library I am using in my local workspace compared to the cloud release version. In those cases, I need to make a change to the file: project.properties so my local version of the library will be flashed instead of the cloud version.