Hello, I have the "linked account to play" option turned on, the "Whitelisted players bypass check: true" option is turned on and finally I am using the connection to mysql to verify the linked accounts when accessing 2 servers:
Experiment_JdbcAccountLinkBackend: "jdbc:mysql://localhost:3306/db_discordsrv?autoReconnect=true&useSSL=false"
Experiment_JdbcTablePrefix: "discordsrv"
Experiment_JdbcUsername: ""
Experiment_JdbcPassword: ""

The problem occurs when there is a lot of player traffic, the whitelist add command works, but Discordsrv will still block people, and display the link message.
I tried removing and re-adding to the whitelist but Discordsrv is ignoring it and doesn't seem to take the whitelist into account.
The only option to allow access to the desired players is to add them to the "Bypass names:" list, but that has to be done manually and reload the configuration, hopefully I can take a look, I need to automate access.

I will provide the latest report if you want to check it, although I have not seen any errors in the console.
http://heberon.com/descargas/latest.log

Paper 1.16.5 dev 642
DiscordSRV-Build-1.22.0.jar
Java 8

Thanks for your quick response.
Since the "Bypass names:" list works, an alternative would be to add a command that allows adding a user to the mentioned list and reloading it.

That has already been suggested: #564

The whitelist bypass might not work for players that haven't logged on the server before, will need to investigate this further