diff --git a/common/script/fns/predictableRandom.js b/common/script/fns/predictableRandom.js
index 373e015500..e67daf3b62 100644
--- a/common/script/fns/predictableRandom.js
+++ b/common/script/fns/predictableRandom.js
@@ -5,7 +5,12 @@ import _ from 'lodash';
 
 module.exports = function predictableRandom (user, seed) {
   if (!seed || seed === Math.PI) {
-    seed = _.reduce(user.stats, (accumulator, val) => {
+    let stats = user.stats.toObject ? user.stats.toObject() : user.stats;
+    // These items are not part of the stat object but exists on the server (see controllers/user#getUser)
+    // we remove them in order to use the same user.stats both on server and on client
+    stats = _.omit(stats, 'toNextLevel', 'maxHealth', 'maxMP');
+
+    seed = _.reduce(stats, (accumulator, val) => {
       if (_.isNumber(val)) {
         return accumulator + val;
       } else {
diff --git a/website/server/controllers/api-v3/user.js b/website/server/controllers/api-v3/user.js
index a96bd43453..3e6bd8b8da 100644
--- a/website/server/controllers/api-v3/user.js
+++ b/website/server/controllers/api-v3/user.js
@@ -37,6 +37,8 @@ api.getUser = {
     delete user.apiToken;
 
     // TODO move to model? (maybe virtuals, maybe in toJSON)
+    // NOTE: if an item is manually added to user.stats common/fns/predictableRandom must be tweaked
+    // so it's not considered. Otherwise the client will have it while the server won't and the results will be different.
     user.stats.toNextLevel = common.tnl(user.stats.lvl);
     user.stats.maxHealth = common.maxHealth;
     user.stats.maxMP = common.statsComputed(user).maxMP;