Very often I face the same problem:
Some script is changing some value (like transform) and it would be great to have a tool to print the stack of the code that make the modification.
In Visual Studio 2013 there is an option to add a “data breakpoint” which will stop the program whenever the given value changes.
Unfortunately, its for C++ only.
Usually I write a wrapper to debuglog whenever the wrapped code is accessed.
However, this solution consumes time
An option that you have is modify the var to a private field and become a property (with get and set). In this way you can use the breakpoint in the set function.
You can right-click a breakpoint and choose Breakpoint Properties to open a dialog where you can set a condition. Some breakpoints should help you to drill down the code that acidentally modifies the properties.