Artifacts deployed wrongly when not using standard deploy path OR separate drive volumes

Sometimes, artifacts are deployed onto wrong volume on Windows platform.

Steps to reproduce:
1) Install JBT on first volume (e.g. C
2) setup AS runtime on different volume (e.g. D with deployment location set so server deploy dir
3) Try to stop/start server & deploy/undeploy artifacts

Sometimes, artifacts are copied to wrong volume (C: in my case). The deploy folder si silently created on that volume, artifacts coppied. No error logged, JBT assumes everything went fine.

For non-windows:
Setting deploy folder to custom location, i.e. /Users/max/tmp/deploy instead of within the server default location similar problems are seen!