UserAgent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.81 Safari/537.36

Steps to reproduce the problem:
1. build a webforms project using telerik
2. soom page to 150% or greater
3. open radwindow

What is the expected behavior?
window should open on top of the rest of the page objects 

What went wrong?
sys.ArgumentOutOfRangeException: Value must be an integer.
Parameter name: y
Actual value was -2.6666717529296875.
    at Function.Error$create [as create] (ScriptResource.axd:237)
    at Function.Error$argumentOutOfRange [as argumentOutOfRange] (ScriptResource.axd:302)
    at Function$_validateParameterType [as _validateParameterType] (ScriptResource.axd:217)
    at Function$_validateParameter [as _validateParameter] (ScriptResource.axd:130)
    at Function$_validateParams [as _validateParams] (ScriptResource.axd:84)
    at new Sys$UI$Bounds (ScriptResource.axd:3928)
    at Object.getBounds (ScriptResource.axd:244)
    at a.RadWindow._getCurrentBounds (ScriptResource.axd:718)
    at a.RadWindow._getCentralBounds (ScriptResource.axd:724)
    at a.RadWindow.center (ScriptResource.axd:504)

Did this work before? Yes 56

Chrome version: 58.0.3029.81  Channel: stable
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version: