message_reads events break the stealth session model

[lightyrs]

I'm implementing message_reads and encountering the following issue:

Given the default route method in BotController, for example:

def route
  if current_session.present?
    step_to session: current_session
  else
    step_to flow: 'hello', state: 'say_hello'
  end
end

When a message_read event occurs, the bot will go into an infinite loop.

In order to mitigate this, I'm creating *_read states for every state and doing this in the BotController:

def route
  if current_session.present?
    if !in_read_state? && current_message&.read.try(:[], :watermark)
      step_to_read_state
    else
      step_to session: current_session
    end
  else
    step_to flow: 'hello', state: 'say_hello'
  end
end

def step_to_read_state
  update_session_to state: "#{current_session.state_string}_read"
end

def in_read_state?
  current_session.state_string.match(/_read$/)
end

however, this simply leads to dropping through the CatchAll stack.

Ideally, stealth should be able to handle events like message_read in a different way than actual message received events.