bug in nuxt on server?

Question

Vue.js

We put the application in production and one user has an error

[nuxt] Error while initializing app DOMException: Failed to execute 'appendChild' on 'Node': This node type does not support this method.

Nothing strange was found in the code and by typing I found the reason:

<div class="form-block" v-if="$store.state.language === 'ru'">
    <label>Zip code *</label>
</div>

The v-if="$store.state.language=== 'ru'" construct causes an error.
In vuex:

...
        state: () => ({
            language: 'en',
        }),
        actions: {
            nuxtServerInit ({ commit }, { req }) {
                let language = 'en';

                if (req.headers['accept-language']) {
                    if (req.headers['accept-language'].toLowerCase().indexOf('ru') > -1) {
                        language = 'ru';
                    }
                }

                commit('setLanguage', language);
            }
        }

That is, the language is defined initially on the server. And the error is only for one user and only in chrome!
It seems that I found a post with the same situation https://github.com/nuxt/nuxt.js/issues/3575 but they didn’t come to anything there.
What can be wrong?