port-amd64/54895: x server crashes when i change size of windows

[cynicfm%linux.pl@localhost]

>Number:         54895
>Category:       port-amd64
>Synopsis:       x server crashes when i change size of windows
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    port-amd64-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Jan 25 16:30:01 +0000 2020
>Originator:     Filip
>Release:        8.1
>Organization:
home
>Environment:
NetBSD leptop 8.1 NetBSD 8.1 (GENERIC) #0: Fri May 31 08:43:59 UTC 2019  mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/amd64/compile/GENERIC amd64

>Description:
Ok hey

So basically i have just installed netbsd for first time ever, and i encountered some crashed with x server and it's not just me, few people reported on irc they r having similar stuff like just crash...
For example when i change size of xfce terminal window using mouse button then openbox or lxde session suddenly crashes and what i see after that happens is something like this:

https://framapic.org/SXSUJ5sV8Ppk/AzvyS9qmeF2l.JPG
or
https://framapic.org/rUWOw3zb6QIB/UeVgUT5cfCHZ.JPG

so i have to type startx *openbox* or startx startlxde to get back to the window manager or desktop environment... And re-open every program again... It makes the netbsd experience very unstable...
Things are ok if i dont move or resize the windows though...

>How-To-Repeat:
Well the easiest method that happens on this laptop i have is to open xfce terminal then click in the corner of the window with mouse and try to resize it to full screen then bam CRASH happens...

>Fix:
I have no idea ;(