Session destroying its self after adding an object to it

I have opened a stackoverflow question about it:

http://stackoverflow.com/questions/35050999/koa-session-getting-reset-after-appending-object-to-it

But I'll copy pasta it here anyways

I have a controller which looks up a character, and then does some stuff with it, the controller looks like:

    router.post('/profile/characters', async ctx => {
        try {
            ctx.type = 'json';
            let req = ctx.request;
            if (!('charname' in req.body) || !('charserver' in req.body)) {
                return res.json({
                    'success': false,
                    error: 'You are missing either the character name, or server'
                });
            }

            let foundChar = await new Promise((res, rej) => {
                bnet.wow.character.aggregate({
                    origin: 'us',
                    realm: req.body.charserver,
                    name: req.body.charname,
                    fields: ['items', 'talents']
                }, (err, charData) => {
                    if (err) {
                        console.log(err);
                        return rej(err);
                    }
                    return res(charData);
                });
            });

            if ('status' in foundChar) {
                if (foundChar.status === 'nok') {
                    return ctx.body = {
                        'success': false,
                        error: 'There was an error looking up your character, please ensure its a US character, and has been logged into recently'
                    };
                }
            }

            foundChar.items.level = foundChar.level;
            foundChar.items.class = foundChar.class;
            foundChar.items.thumbnail = foundChar.thumbnail;
            foundChar.items.name = foundChar.name;

            let {
                items, talents
            } = foundChar;

            let specF = talents.find(x => x.selected) || {};
            let charData = {
                items, specF
            };

            if ('legs' in items || 'hands' in items || 'shoulder' in items) {
                return ctx.body = {
                    success: false,
                    error: 'To verify it is your own character, please remove your (Shoulders, Hands, and Pants) from your character and try again.'
                };
            }

            ctx.session.foundChar = foundChar; // This line here
            console.log(ctx.session);
            ctx.body = {
                success: true,
                charData
            };

        } catch (err) {
            console.log(err);
            ctx.status = err.status || 500;
            ctx.body = {
                message: err.message
            };
        }
    });

When it processes ctx.session.foundChar = foundChar it seems to reset my session for some reason, and logging the session shows {} instead of

    { 
       authenticated: true,
       userid: 1
       ...
    }

But if I change ctx.session.foundChar = "Hello"; < Works just fine.

I don't know if there is a data limit or something to the session or what as this wasn't an issue with express-session but I'm trying to convert it all over to Koa, anyways not sure why my session is getting reset.

Example of what foundChar looks like

    { userid: 1,
      username: 'Blah',
      authenticated: true,
      userLevel: 5,
      hasMainCharacter: true,
      foundChar:
       { lastModified: 1453702285000,
         name: 'Blah',
         realm: 'Mal\'Ganis',
         battlegroup: 'Vindication',
         class: 4,
         race: 5,
         gender: 0,
         level: 100,
         achievementPoints: 6335,
         thumbnail: 'internal-record-3684/9/119507209-avatar.jpg',
         calcClass: 'c',
         faction: 1,
         items:
          { averageItemLevel: 714,
            averageItemLevelEquipped: 573,
            head: [Object],
            neck: [Object],
            back: [Object],
            chest: [Object],
            wrist: [Object],
            waist: [Object],
            feet: [Object],
            finger1: [Object],
            finger2: [Object],
            trinket1: [Object],
            trinket2: [Object],
            mainHand: [Object],
            offHand: [Object],
            level: 100,
            class: 4,
            thumbnail: 'internal-record-3684/9/119507209-avatar.jpg',
            name: 'Blah' },
         talents: [ [Object], [Object] ],
         totalHonorableKills: 258 } }

So this logs properly, but then after refreshing the page im no longer authenticated and ctx.session is {}

koajs / session

Session destroying its self after adding an object to it #52