Request status pending

hi t eam, we are using company house nuget package to connect to CH and fetch detail; what we are noticing is that the production version stopped working when we key in string rather than alpha numeric value. So we upgrade to the latest version of CH but our sitecore based iis hosted site is not able to get a response…it shows pending status for almost five minutes and times outs. The same works fie when we try to connect using a console application. Not sure what is happening.

Is this some known issue or that you help us with.