Styles don't work, delay on expand TreeGrid

I've done everything according to the guide, but styles are not applied. Angular 7, @nebular/theme 3.4.2
Imported
```
NbThemeModule.forRoot(),
NbLayoutModule,
NbTreeGridModule,
```
angular.json
```
"styles": [
"src/styles.css",
"node_modules/@fontawesome/fortawesome-free/css/all.css",
"./node_modules/@nebular/theme/styles/prebuilt/default.css"
],
```

Tree grid:

```

Search:

{{customColumn}}


{{row.data[customColumn]}}

{{column}}

{{row.data[column] || '-'}}

```