PS4 World Conversion to bedrock reverts some chunks to initial state

With Minecraft PS4 bedrock just released today. 1.15/ update 1.99 on ps4. I'm sure there would be bugs springing up. I ran across problems with converting my minecraft world i was playing on yesterday. My recent save in my world into bedrock cause terrain that i had houses and buildings built to be overwritten back to trees and mountains that i had cleared in that area. I've had this problem before on the PS4 edition of Minecraft over a year ago. I don't understand why the computer keeps regenerating terrain in areas that i've already cleared. What terrain clearing and structures i built should stay the same as they are in the new transfer worlds. I hope this can get fixed soon. I would hate to put another year in fixing damages that shouldn't be occurring. 

Update:

I've converted my world from PS4 edition of Minecraft to the Bedrock Edition a total of 4 times. The same area in my world keeps getting destroyed. structures I've built are destroyed and the area is transformed back to an earlier period when i was in the midst of building my neighborhood. So far all my friends worlds have transitioned from ps4 to bedrock with no issues, but yet I'm still having issues with my world. I hope to get help soon.