Convert 1.12 Map to 1.13 Map deletes chunks with "LightPopulated" set to false (Caused by using external editor)

i want to convert my Minecraft 1.12.2 Map to the 1.13 to play with the new design elements,
But very mutch chunks will be random new generated. My Server version was 1.12.2 and the test version was 1.13pre1-5 i become no Error Log.

Here is my map i hope so the Team is descrete with it: https://classic.hidrive.com/lnk/15YOW9Y6
My Server IP is: 136.243.170.173:25571
virustotal link: https://www.virustotal.com/de/file/689c634bda577c31f6e5a66cdc185971624a73adafc836beed531421709d6d3a/analysis/1530276584/
https://www.virustotal.com/de/url/f5dd23e78bbab2b1f06ed48734c28c8d39283a9ed417e2cd07c5115d74cb907c/analysis/1530276678/