On hyperstack, deletion of "has_many :through" association fails only the first time

Question

On hyperstack, Assignment#destroy method fails with "Bad request" only on the first trial, where the Assignment is a model through which "has_many" relationship is made. The #destroy succeeds on the second trial.

I have installed the rails-hyperstack gem of 'edge' branch.

I am trying to make a many to many relationship between Issue and Agent models through Assignment model as below :

class Assignment < ApplicationRecord
  belongs_to :agent
  belongs_to :issue
end

class Issue < ApplicationRecord
  has_many :assignments, foreign_key: :issue_id
  has_many :agents, through: :assignments
end

class Agent < ApplicationRecord
  has_many :assignments, foreign_key: :agent_id
  has_many :issues, through: :assignments

  def deassign(number)
    issue = issues.find_by(number: number)
    assignments.find_by(issue_id: issue.id).destroy.then do |result|
      if result[:success]
        issues.delete(issue)
        return true 
      end
      puts "deassign failed #{result[:message]}"
      return false
    end
  end
end

class Main < HyperComponent

  before_mount do
    @agent = Agent.first
  end

  render(UL) do
    @agent.issues.pluck(:number).each do |num|
      LI { num.to_s }
      .on(:click) do
        @agent.deassign(num)
      end
    end
  end
end

Issue numbers are listed on the page.

When a number is clicked, Agent#deassign(number) is called, and it calls Assignment#destroy. This way, I am trying to delete the association on the hyperstack, because issues.delete(issue).save can't be used in this case.

Assignment#destroy fails only on the first time when the number is clicked. It succeeds on the second time, and the relationship is deleted successfully.

The error and the call stack displayed in the chrome developer console when the #destroy fails :

http.rb:193 POST http://localhost:5040/hyperstack/execute_remote 400 (Bad Request)
send    @   http.rb:193
post    @   http.rb:126
run @   server_op.rb:14
destroy @   isomorphic_base.rb:560
Opal.send   @   runtime.self-a59b728…763d.js?body=1:1605
destroy @   instance_methods.rb:161
deassign    @   agent.rb:7