Rendering some panels timeout

Hi, there
I found three kind of rendering bugs:

1.Clock Panel #when i request the render link that will response Timeout error even i add the &timeout url parameter and the grafana server logs like this:

INFO[01-31|16:15:43] Rendering                                logger=png-renderer path="dashboard-solo/new?orgId=51&panelId=2&from=1517364940921&to=1517386540921&width=1000&height=500&tz=UTC%2B08%3A00"
Loading a web page: http://localhost:80/dashboard-solo/new?orgId=51&panelId=2&from=1517364940921&to=1517386540921&width=1000&height=500&tz=UTC%2B08%3A00 status: success 60000

EROR[01-31|16:16:43] Timeout error. You can set timeout in seconds with &timeout url parameter logger=context userId=1 orgId=51 uname=admin error="Timeout error. You can set timeout in seconds with &timeout url parameter"
EROR[01-31|16:16:43] Request Completed                        logger=context userId=1 orgId=51 uname=admin method=GET path=/render/dashboard-solo/new status=500 remote_addr= time_ms=60010 size=1183 referer=""
EROR[01-31|16:16:43] failed to render an image                logger=png-renderer error="signal: killed"    

2.Graph Panel #when i set the Legend Options To the right that rendering timeout the same
3.Dashboard #Once a DASHBOARD included the Row Panel that rendering timeout as the same

I could not figure the reason out just guess if there any bugs for rendering some special Panel or special layout ?
Any guys have an idea for this , pls help me and thanks a lot !
By the way , i use version=5.0.0-pre1 commit=cd2161e

Think this is this issue and it just got fixed in the Grafana 5.0 beta2 release which was released today.