[Outdated][Bug 1.14]Game freezes when in background for a while

I had the game loaded, paused and in the background while I was filing a bug report. Once I was done I went back to the game just to quit but it was unresponsive. I was still playing music and sometimes clicks would make the sounds but I could not unpause and no dialogs showed up. I checked Task Manager and it was only using about 400MB and 0% CPU.

Here are my specs.

Microprocessor 2.50 GHz 3rd generation Intel Core i5-3210M Processor with Turbo Boost Technology up to 3.10 GHz Memory 6GB DDR3 SDRAM (2 DIMM) Video Graphics Intel HD graphics 4000 with up to 1696MB total graphics memory Display 15.6-inch diagonal HD BrightView LED-backlit display (1366x768) Hard Drive 750GB 5400RPM hard drive with HP ProtectSmart Hard Drive Protection Sound Altec Lansing speakers with Dolby Advanced Audio v2