Accès mémoire invalide - TCustomScpExplorerForm::CreateOpenDirMenu

(English not native)
Dear WinSCP Team, I recently found a exception on WinSCP 5.14.4 RC (Compilation 9136) version.
Environnement description : Windows 10 pro 1809 64 bits. Windows Dark Theme enabled. WinSCP version 5.14.4 RC 9136. WinSCP Commander Interface.
Steps description :
1) Open WinSCP
2) Close login popup
3) Click on the arrow from 'open directory' (see capture)

It always happens on this menu item.
It often happens on the button on his left

WinSCP 5.14.4

Error message:
Accès mémoire invalide.

Trace de la pile :
(0002B0DB) TCustomScpExplorerForm::CreateOpenDirMenu
(00083FFF) ntdll.dll
(00071931) ntdll.dll.KiUserExceptionDispatcher
(000523F0) TScpCommanderForm::LocalOpenDirButtonPopup
(004B43B2) Tbx::TTBXCustomItem::CreatePopup

I know how to reproduce the problem or the problem happens frequently enough. I wish to be contacted by the WinSCP team to help resolving the problem.

Thanks for your report.

This bug has been added to the tracker:
https://winscp.net/tracker/1726

I'm sending you an email with a development version of WinSCP.