We have had a lot of failures of low profile encapsulated transformers made by Clairtonic, now deceased.
We have just got some German transformers from Marschner that look like total crap.
See:
One of my guys said the other day that the input current was higher than the old transformers but I didn't investigate.
I went to look at another issue and happened to touch a transformer. Hot. Grabbed the infrared thermometer and found a hot spot of 96C over the primary. Input current with no load is 57mA. That's 13.7VA off load on a 10VA transformer. Input current doesn't change when output current is 41mA.