After upgrade to 10.5.2 the Team Center map is missing object icons when viewed with IE11 and only relationship lines are visible. This problem did not exist in 10.5.1.
TypeError: Object doesn't support property or method 'find'
Chrome, Firefox & Edge display the icons correctly e.g.
This problem has been resolved in 10.5.2 HotFix 2 which can be requested via a Support case (APM10.5.2HF2_DE302229.zip)
The Browser Compatibility for APM Team Center can be viewed via the new PCM website: