1. What happened

Whenever Saving data for bones from Character configuration Wizard Continous Assertion Failed ALLOC_Temp_Thread pops up
"Assertion failed: TLS Allocator ALLOC_TEMP_THREAD, underlying allocator ALLOC_TEMP_THREAD has unfreed allocations, size 641
"with the same stack trace, and we get it continously on the console

Steps To Reproduce
1.Download Free Character Monster or any other character asset from the asset store belonging to humanoid type of character
2.Select the character in the project folder
3.Open Rig - > Configuration Wizard (If the asset is generic, change it to humanoid Rig)
4.Click Mapping before the configuration -> From the dropdown Select Save

Actual Result:
Continuous Errors at Console

Expected Result :
No Error At Console

Frequency:
Always

Version Tested : 2017.3 Beta 7, 2017.3 Beta 6, 2017.3 Beta 5

Version Where Error Does Not Occur : 2017.1 , 2017.2

Stack Trace :
Assertion failed: TLS Allocator ALLOC_TEMP_THREAD, underlying allocator ALLOC_TEMP_THREAD has unfreed allocations, size 641