Shared notebook gets deleted if contributor changes its title

[hunhejj]

Operating system

macOS

Joplin Server version

Self hosted Joplin Server v2.13.5 (dockerized)

Desktop version info

irrelevant

Current behaviour

Given I am logged in as "Alice"
When I create a notebook "Top secret notebook"
And I share the notebook with "Bob"
And I log in as "Bob"
And I accept the shared notebook
And I change the name to "Flawed notebook"
‼️Then the share button sign is not visible next to the notebook anymore
When I log in as "Alice", i.e. the original owner of the notebook
‼️Then the notebook is removed all together
‼️And all its notes are deleted.
When I log in as "Bob"
And I try to share the notebook with "Alice"
⚠️Then I get the error message "shared item cannot be shared again".

Expected behaviour

Given I am logged in as "Alice"
When I create a notebook "Top secret notebook"
And I share the notebook with "Bob"
And I log in as "Bob"
And I accept the shared notebook
And I change the name to "Flawed notebook"
Then the share button is visible next to the notebook
When I log in as "Alice", i.e. the original owner of the notebook
Then the notebook is visible
And it is called "Flawed notebook".