This seems too close to be coincidental. Unfortunately, it's unclear exactly what happened beyond that the server seemingly forced the connection closed from its side, the bot process continued to run, and the bot seemingly didn't have the proper event emitted for it to handle the fact that the connection was closed.
Last line in the current log file from an instance connected to Freenode:
Then, at roughly 15:07, in a separate client:
This seems too close to be coincidental. Unfortunately, it's unclear exactly what happened beyond that the server seemingly forced the connection closed from its side, the bot process continued to run, and the bot seemingly didn't have the proper event emitted for it to handle the fact that the connection was closed.