Traits doesn't fill defaults from current entity attributes, when called on an instance with attributes complex, but with default values on the complex attribute class.

Supplementary:
The wavelet portlet seems to ignore Frequency range settings and fall back to
default, both in the resulting visualisation and if you reopen the configure
after a burst is run (frequency hi and lo are 0.0). Even configuring them,
clicking save then reopening shows the original values not the ones you saved.
This is not the case for sample period, so it seems to be a range related
issue.