[MC-125706] Server hang at launch

Launching server using

java -Xmx4096M -Xms4096M -jar minecraft_server.18w07c.jar -o true

Server hangs after displaying the following

[17:52:18] [main/WARN]: Ambiguity between arguments [teleport, destination] and [teleport, targets] with inputs: [Player, 0123, @e, dd12be42-52a9-4a91-a8a1-11c01849e498]
[17:52:18] [main/WARN]: Ambiguity between arguments [teleport, location] and [teleport, destination] with inputs: [0.1 -0.5 .9, 0 0 0]
[17:52:18] [main/WARN]: Ambiguity between arguments [teleport, location] and [teleport, targets] with inputs: [0.1 -0.5 .9, 0 0 0]
[17:52:18] [main/WARN]: Ambiguity between arguments [teleport, targets] and [teleport, destination] with inputs: [Player, 0123, dd12be42-52a9-4a91-a8a1-11c01849e498]
[17:52:18] [main/WARN]: Ambiguity between arguments [teleport, targets, location] and [teleport, targets, destination] with inputs: [0.1 -0.5 .9, 0 0 0]
[17:52:18] [main/INFO]: Loaded 0 recipes
[17:52:18] [main/INFO]: Loaded 0 advancements

World does not generate, no further feedback, must use Ctrl-C to kill process. Very rarely (<5%) the process will launch, and the GUI will appear. Later version I was able to launch was 18w02a.

Tried launching without the "-o true", and adding "nogui" without success. I've made sure that this java release is whitelisted with the Windows Firewall.