Datepicker Material Design Angular 5 - opens empty windows - material-design

Question

See the behavior -
https://drive.google.com/file/d/1NG-CdTq3EgjDX8kc8VOSkPimYOzjdFSA/view
When I resize the browser it shows the content of mat-calendar, but initialy it is blank.
<mat-form-field>
<input matInput [matDatepicker]="picker" placeholder="Choose a date">
<mat-datepicker-toggle matSuffix [for]="picker"></mat-datepicker-toggle>
<mat-datepicker #picker></mat-datepicker>
</mat-form-field>
MatDatepickerModule and MatNativeDateModule imported..
Package.json dependencies
"private": true,
"dependencies": {
"#angular/animations": "^6.0.7",
"#angular/cdk": "^5.2.5",
"#angular/common": "6.0.7",
"#angular/compiler": "6.0.7",
"#angular/core": "6.0.7",
"#angular/flex-layout": "^6.0.0-beta.16",
"#angular/forms": "6.0.7",
"#angular/http": "6.0.7",
"#angular/material": "^5.2.5",
"#angular/platform-browser": "6.0.7",
"#angular/platform-browser-dynamic": "6.0.7",
"#angular/router": "6.0.7",
"angular-bootstrap-md": "^6.0.1",
"angularfire2": "^5.0.0-rc.6",
"bootstrap": "^4.1.1",
"chart.js": "^2.5.0",
"core-js": "^2.4.1",
"firebase": "4.12.1",
"font-awesome": "^4.7.0",
"hammerjs": "^2.0.8",
"ng4-geoautocomplete": "^0.1.0",
"ngx-toastr": "^8.8.0",
"promise-polyfill": "7.1.2",
"rxjs": "^6.2.1",
"rxjs-compat": "^6.2.1",
"rxjs-tslint": "^0.1.5",
"zone.js": "^0.8.26"
},
"devDependencies": {
"#angular/cli": "^6.0.8",
"#angular/compiler-cli": "6.0.7",
"#angular/language-service": "6.0.7",
"#types/jasmine": "~2.8.3",
"#types/jasminewd2": "~2.0.2",
"#types/node": "~6.0.60",
"codelyzer": "^4.0.1",
"jasmine-core": "~2.8.0",
"jasmine-spec-reporter": "~4.2.1",
"karma": "~2.0.0",
"karma-chrome-launcher": "~2.2.0",
"karma-coverage-istanbul-reporter": "^1.2.1",
"karma-jasmine": "~1.1.0",
"karma-jasmine-html-reporter": "^0.2.2",
"protractor": "~5.1.2",
"ts-node": "~4.1.0",
"tslint": "~5.9.1",
"typescript": "2.7.2",
"#angular-devkit/build-angular": "~0.6.8"
}
}
Why isn't it working?
What should I change adjust?
I am also working with MDBootsrap, can it be the problem?
Update
Updated a bit the package.json
It was a bit of a straggle to make things work again so use with cautious.
{
"name": "kai.starter",
"version": "0.0.0",
"license": "MIT",
"scripts": {
"ng": "ng",
"start": "ng serve ",
"start-prod": "ng serve --aot --prod --configuration production",
"build": "ng build --aot --prod --configuration production",
"test": "ng test",
"lint": "ng lint",
"e2e": "ng e2e"
},
"private": true,
"dependencies": {
"#angular/animations": "^6.0.7",
"#angular/cdk": "^5.2.5",
"#angular/common": "6.0.7",
"#angular/compiler": "6.0.7",
"#angular/core": "6.0.7",
"#angular/flex-layout": "^6.0.0-beta.16",
"#angular/forms": "6.0.7",
"#angular/http": "6.0.7",
"#angular/material": "^5.2.5",
"#angular/platform-browser": "6.0.7",
"#angular/platform-browser-dynamic": "6.0.7",
"#angular/router": "6.0.7",
"#ng-bootstrap/ng-bootstrap": "^3.0.0",
"#ngrx/store": "^6.0.1",
"#ngrx/store-devtools": "^6.0.1",
"angularfire2": "^5.0.0-rc.7",
"bootstrap": "^4.1.1",
"chart.js": "^2.5.0",
"core-js": "^2.4.1",
"firebase": "4.12.1",
"font-awesome": "^4.7.0",
"hammerjs": "^2.0.8",
"jquery": "^3.3.1",
"ng-bootstrap": "^1.6.3",
"ng4-geoautocomplete": "^0.1.0",
"ngx-geoautocomplete": "^0.1.1",
"ngx-toastr": "^8.8.0",
"promise-polyfill": "7.1.2",
"rxjs": "^6.2.2",
"rxjs-compat": "^6.2.2",
"rxjs-tslint": "^0.1.5",
"zone.js": "^0.8.26"
},
"devDependencies": {
"#angular/cli": "^6.0.8",
"#angular/compiler-cli": "6.0.7",
"#angular/language-service": "6.0.7",
"#types/jasmine": "~2.8.3",
"#types/jasminewd2": "~2.0.2",
"#types/node": "~6.0.60",
"codelyzer": "^4.0.1",
"jasmine-core": "~2.8.0",
"jasmine-spec-reporter": "~4.2.1",
"karma": "~2.0.0",
"karma-chrome-launcher": "~2.2.0",
"karma-coverage-istanbul-reporter": "^1.2.1",
"karma-jasmine": "~1.1.0",
"karma-jasmine-html-reporter": "^0.2.2",
"protractor": "~5.1.2",
"ts-node": "~4.1.0",
"tslint": "~5.9.1",
"typescript": "2.7.2",
"#angular-devkit/build-angular": "~0.6.8"
}
}
It started working suddenly without specific explanation what was the problem ..
I've also removed the mdbootsrap from the project, but it worked well before that as well.