Thanks for contacting Plugable support, I’ll be happy to help.
We’ve seen a nearly identical issue previously:
In this case, the issue turned out to essentially be that the tablet could not supply enough power for the adapter. For what it’s worth, I personally have a TF300T as well that I sue the USB2-E1000 with no problems with- I might recommend contacting ASUS to see if they can help with a repair/replacement. Another option is to use a powered USB 2.0 hub between the tablet and adapter to help confirm if this is indeed a power issue, and to get a stable connection by using the USB hub’s power supply to avoid issues with the tablet’s ability to supply needed power.
Hope this helps. Please let me know of any other questions.