Air carrier Captain reported a loading segregation violation with two Hazmat items during preflight. The Hazmat cargo was reloaded correctly prior to departure.

Narrative

We found Class 4.3 HAZMAT loaded into the same location as Class 8 HAZMAT. When we asked the Loadmaster about this; she had the station re-loaded and ensured minimum adequate separation of HAZMAT. This caused about 30 minutes' delay. Recent changes to our fleet's scheduling policies makes it so there is not much extra time after you reach the plane at some of our stations. Issues like these become harder to detect and correct; especially at ZZZZ.I don't know why Class 4.3 and 8 were loaded into the same location. Perhaps this was a function of when certain deliveries were made or when and how paperwork was processed compared to loading. What I do know is that it takes some time to get from the hotel to the airplane at ZZZZ. We recently reduced our reporting time on this fleet specifically by 30 minutes. This means that any issue like this becomes harder to detect and correct. This creates pressure on a crew and makes detecting misloading of Hazardous materials harder to detect.Suggestions: Don't load Hazmat that requires separation into the same location on the plane. Return to 3 hour wake up at ZZZZ and other locations outside the continental US.