Process Explorer - Undue "tooltip" with garbage data

reactos-bootcd-0.4.15-dev-6846-gb3c1f65-x86-gcc-lin-dbg
Process Explorer 16.21 from https://www.filepuma.com/download/process_explorer_16.21-15301/download/ 

Shows "ê" as tooltip while on columns. This does NOT occur in Win2K3

Unabling DEBUGCHANNEL=+tooltips

it shows :

trace:(dll/win32/comctl32/tooltips.c:642) Show tooltip 0, L"\00ea", size 10 x 17

while L"\00ea" is ê

same problem with PE 15.23 with a different glyph :

Unabling DEBUGCHANNEL=+tooltips

it shows :

trace:(dll/win32/comctl32/tooltips.c:642) Show tooltip 0, L"\0001", size 15 x 17 

while L"\0001" is Unicode Start of heading  (
)

Guilty code : problem only comes when the "ask parent" fallback code path is used : https://git.reactos.org/?p=reactos.git;a=blob;f=dll/win32/comctl32/tooltips.c;hb=062890ac5f29cdd6ddad3601cbcbec8451a5e455#l487 

Added in Wine by https://github.com/wine-mirror/wine/commit/ff826eb14a9e3b70e2755f7d9fdd15e117bedc5a but it looks like WM_NOTIFY should not be sent to parent : https://www.winehq.org/pipermail/wine-devel/2007-October/060182.html 

Fixed by tooltip_fix.patch

Note : Regression introduced by https://github.com/reactos/reactos/commit/96cdd6485c56b5e488868b93f643c6461ad74fe0 in ReactOS 0.4.7

====

Other log item of interest :

err:(dll/win32/comctl32/tooltips.c:2407) unknown msg 041f wp=00000001 lp=0012f378 

This corresponds to TTM_ADJUSTRECT (0x041f) https://learn.microsoft.com/en-us/windows/win32/controls/ttm-adjustrect which is currently unimplemented as per https://git.reactos.org/?p=reactos.git;a=blob;f=dll/win32/comctl32/tooltips.c;hb=6294f5b3ff443af3602275954c1a450c0e7eca45#l35 

Massively logspam with : 

(ntoskrnl/ps/query.c:101) NtQueryInformationProcess(): Information verification class failed! (Status -> 0xc0000004, ProcessInformationClass -> 1)