The automatic island creation does not work

[denisdnu]

Description

Describe the bug

The automatic island creation does not work upon the player's first login on my server.
When a player joins the server, he is spawned in the world in survival mode and no father automatic island creation occurs in the next 6 and more seconds, as it's set in addon config.yml.
When I type /island go, I'm getting "You do not have an island!" message.

Steps to reproduce the behavior

Set next property in /plugins/BentoBox/addons/BSkyBlock/config.yml file:

create-island-on-first-login:
  enable: true
  delay: 5

Also, I have a Blueprint Bundle called "default" in blueprints folder:
root@minecraft:~/SkyBlock/plugins/BentoBox/addons/BSkyBlock/blueprints# ls -la
total 40
drwxr-xr-x 2 root root 4096 Mar 9 17:51 .
drwxr-xr-x 3 root root 4096 Mar 10 09:06 ..
-rw-r--r-- 1 root root 397 Mar 9 17:43 default.json
-rw-r--r-- 1 root root 3657 Mar 9 17:43 double.blu
-rw-r--r-- 1 root root 327 Mar 9 17:43 double_island.json
-rw-r--r-- 1 root root 1077 Mar 9 17:43 end-island.blu
-rw-r--r-- 1 root root 1221 Mar 9 17:43 harder.blu
-rw-r--r-- 1 root root 327 Mar 9 17:43 harder_island.json
-rw-r--r-- 1 root root 1422 Mar 9 17:43 island.blu
-rw-r--r-- 1 root root 2771 Mar 9 17:43 nether-island.blu

Expected behavior

When a player joins the server first time, a new island is created and appropriate message is displayed.

Screenshots and videos (Optional)

Environment

Ubuntu 18.04.3 LTS
openjdk version "11.0.6" 2020-01-14
OpenJDK Runtime Environment (build 11.0.6+10-post-Ubuntu-1ubuntu118.04.1)
OpenJDK 64-Bit Server VM (build 11.0.6+10-post-Ubuntu-1ubuntu118.04.1, mixed mode, sharing)
Spigot server:
spigot-1.15.2.jar

BentoBox Version (Mandatory)

>bentobox version
[09:16:15] [Server thread/INFO]: Running SPIGOT 1.15.2.
[09:16:15] [Server thread/INFO]: BentoBox version: 1.11.1
[09:16:15] [Server thread/INFO]: Database: JSON
[09:16:15] [Server thread/INFO]: Loaded Game Worlds:
[09:16:15] [Server thread/INFO]: bskyblock_world (BSkyBlock): Overworld, Nether, The End
[09:16:15] [Server thread/INFO]: Loaded Addons:
[09:16:15] [Server thread/INFO]: BSkyBlock 1.11.0 (ENABLED)

Plugins (Optional)

>plugins
[09:17:41] [Server thread/INFO]: Plugins (1): BentoBox

Additional context (Optional)

I tried both with and without bungeecord server
I tried adding worlds generator into bukkit.yml as next:
worlds:
bskyblock_world:
generator: BentoBox
bskyblock_world_nether:
generator: BentoBox
bskyblock_world_the_end:
generator: BentoBox