I have a module file which contains two search result web part. These two search result web part were both configured then exported as .webpart file via the SP UI. I used the exact content of the .webpart file to define my search result web parts in the module. When I load the page initially, one of the webpart will fail, upon refreshing one to three times the issue is gone. The problem is that this happens even when cache is cleared.
The two search result web part is connected to two separate search box. Which is correct when I check the properties. I cannot find anything on the ULS log either, correlation ID is always 00000-0000...