Hey Steven,
I’m not sure what the Unity is doing there, but it seems to me that the response is just slow.
What exactly did you do before, did you extend the timeout of the Check_MK Services or did you extend the check interval? Because just changing the interval doesn’t increase the timeout.
In the commercial editions there is a rule “Service check timeout (Micro Core)”, which you can create and match on your Unity Host and its Check_MK Services. Please note that in addition to this, you will also need to change the check & retry interval for the same Host / Services.
If you have a Raw edition, you can only change the timeout for your whole site, see EMC Unity "timeout" setting - #2 by lbuhleie