More a feature request, not a bug. It would be helpful if the server prints out a list of all add-ons loaded at server start (name, uuid, version) As in 

[2019-07-29 12:20:33 INFO] Starting Server
[2019-07-29 12:20:33 INFO] Version 1.12.0.28
[2019-07-29 12:20:33 INFO] Session ID 4220227b-b45a-4b33-8246-b75079458971
[2019-07-29 12:20:33 INFO] Level Name: Bedrock level 3
[2019-07-29 12:20:33 INFO] Game mode: 1 Creative
[2019-07-29 12:20:33 INFO] Difficulty: 1 EASY

[2019-07-29 12:20:33 INFO] Loaded resource pack tutorial_resource_pack ID bc2a0bc9-e3a2-4702-9319-d4d3231dfdbc version 0.0.2 - success