Tire size is a RAM issue. The BCM will not calibrate the park sensors to anything above 35". Not a Tazer issue. Tire change feature for Tazer works without any issue in non-park sensor equipped trucks. Until RAM updates the calibration parameters with their park sensors, you will not be able to use them if you change tire size above 35".
The Tazer's are a simple solution to unlocking features that are already in our trucks but disabled for various reasons by RAM. The Tazer can only be as stable as uConnect is and we all know how bad uConnect sucks. Because of this, it can be glitchy at times.
If you are having issues, I will do my best to try and help get it resolved. Just let me know what its doing (or not doing).