Creepers at my farm2

One of a few screen shots I took

I loaded up blightfall off the Technic launcher and proceeded to go into one of my playthroughs.I used my transporter to Zap over to Delta swamp,my farm and main source of food to gather supplies for an expedition to another Dome.Although it was night,I had a bed there,and it was taint-free so I didn't think twice about it.However,as soon as I got there,I found myself under attack from creepers,skeletons,and zombies.Once I repelled them and regained my bearings,I took several screenshots.

Do you know about this glitch/bug?Any response or additional info would be appreciated.