Entities not shown to players

**Describe the bug**
When "entity-tracking" is enabled, entities are not shown to the player (I suppose packets are not being sent).

**Bug on latest**
 Yes, it is running on the last commit.

**To Reproduce**
Turn on "entity-tracking"

**Expected behavior**
Entities should be shown to the user.

**Additional context**
The server is running without any plugin, only windspigot.
