Table does not load data until until I hover over something

Here is a video showing the problem:

Table won't load data if I don't hover over menu on the left. Data is fetched correctly.
Strange behaviour right?
Removing spinner does not help. Here are my settings, and the way I'm fetching data:

```
TABLE_SETTINGS_SUBJECT = {
add: {
addButtonContent: '',
createButtonContent: '',
cancelButtonContent: '',
confirmCreate: true
},
edit: {
editButtonContent: '',
saveButtonContent: '',
cancelButtonContent: '',
confirmSave: true
},
actions: {
delete: false
},
columns: {
id: {
title: 'ID',
editable: false,
creatable: false
},
name: {
title: 'Name'
}
}
};
```

Data fetching:
```
this._subject.getAllSubjects().subscribe((data: ISubject[]) => {
this.subjects = data;
this.dataSource.load(this.subjects);
this.dataSource.reset();
this.data_loading = false;
},

```
Using latest ng2 smart table version, with ng2 completer and rxjs-compat for resolving issues with deprecation

Any suggestions?