Looks like if you have more than 250+ files to load into your page (which is not unreasonable given we switch to loading all Ext/Sencha classes seperately) then we hit the FD limit and it stops loading the files. The solutions seems to be to kick off a headless web server. I've tested this outside of grunt running phantomjs on the command line using the filesystem to reproduce the issue and then using servedir to host the app.
Looks like if you have more than 250+ files to load into your page (which is not unreasonable given we switch to loading all Ext/Sencha classes seperately) then we hit the FD limit and it stops loading the files. The solutions seems to be to kick off a headless web server. I've tested this outside of grunt running phantomjs on the command line using the filesystem to reproduce the issue and then using servedir to host the app.