heap errors not detected

[mael15]

I have included vld.h in all of my dlls and the exe, but it keeps missing some heap errors. same with _CrtSetBreakAlloc by the way.
what might be wrong? maybe it is because i use vs2017? or because i build for xp (v141_xp)?
this is the end of my output:

No memory leaks detected.
Visual Leak Detector is now exiting.
Detected memory leaks!
Dumping objects ->
{7179} normal block at 0x001BD758, 128 bytes long.
Data: 78 13 E7 05 80 13 E7 05 88 13 E7 05 90 13 E7 05
{5980} normal block at 0x00211570, 772 bytes long.
Data: < > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
{5979} normal block at 0x001C7238, 28 bytes long.
Data: <p ! > 70 15 21 00 C1 00 00 00 00 00 00 00 CD CD CD CD
Object dump complete.