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.
Using Developer Mode/F12 shows JavaScript errors:
TypeError: Object doesn't support property or method 'find'
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Chrome, Firefox & Edge display the icons correctly e.g.
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10.5.2 is using a javascript function Array.prototype.find() which is not supported by IE11, but is supported by Chrome, Firefox & Edge
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: