DrMemory locking my windows thread handles

Hi,
I'm using DrMemory version 1.11.0 -- build 2 on a Windows 7 SP1 MinGW TDM-GCC-64 C++ software. The software is using Boost 1.62 Threads.
When I look at the results, it is said that I have a handle leak, linked with my threads. With process hacker 2, I can see these handles leaking. But if I launch my software without DrMemory, there is no leak.
I tried to use the -no_check_handle_leaks but it didn't correct the leak.
Is this some kind of issue or just a misunderstanding of the DrMemory options?
Regards
Marc