Moving this discussion to the RhoMobile space as this seems like the best place for it to be asked.
Perhaps include your build.yml settings. This will indicate if you are using Motorola Webkit or stock webkit (which should behave the same as the Android browser).
Which version of Rho are you using?
Here's my build.yml file:
I'm using Rho 4.0 and I believe the stock webkit (as I dont specify Motorola webkit anywhere). I've tested on a Samsung Galaxy Tablet II running Android 4.2.2 and a Galaxy S Blaze phone running Android 4.0.4
If you need any additional details, please let me know.