GrammyJS: context changes between conversations

Question

I am building a menu-like form for the user to input some data using a couple of buttons and for each button there is a conversation. I need the bot to be able to persist the user-context between the conversations.

I have some problems when using ctx.session and conversation.session.

1. Changing any props from conversation.session will reflect the change for all users using this bot.
2. Changing any props from ctx.session wont be shown in the next conversation.

Any ideas on how this should be done?