API.AI request handling is buggy; has lost some trained features.

[aschuldhaus]

This could be due to over-saturation of features, or simply through under-usage of trained features.
This is primarily in relation to the Music (Google Play Music) and Wolfram (Wolfram Alpha) modules.
Attempts at re-training or reinforcement of trained neural paths have appeared to have little effect. Perhaps neural training should be started again from scratch.