I’ve kept my GS290 and vollaphone on 4.4.0.72 since everything works and the browser is suck on 4.5. I’ve switched to the Rephone as daily driver since it has more ram and a replaceable battery. On the Rephone I use angelfish as browser and all’s well.
I would just update the volla to 4.4.0.72. and wait to see what develops.