Jungle Temple moved and 3/4 of it dissapeared and forest sprung up in landscaped area.

The Jungle temple moved and most of it dissapeared. It was my main base since it was close to my starting location. everything I had stored in the temple is gone. Not a major dilemma in my life but it is pretty annoying to come back to from exploring an abandoned mine. and some large oak trees appeared on the area I had cleared. Even the basement has been replaced with normal terrain, wtf?

PS after trying to dig where the temple was to see if my chests and tunnels still exist I found that the dirt blocks regenerate after about 2 seconds and I can't dig in that spot.