Why nominatim openstreetmap search is not working in prod environment

In My Project I am using Nominatim openstreetmap for search text , lat and long it will work on local and test environment but in production sometimes its works sometimes not. Angular 6 is the project version

constant.ts

  export class Constants {
  static readonly DATE_FMT = "dd/MMM/yyyy";
  static readonly DATE_TIME_FMT = `${Constants.DATE_FMT} hh:mm:ss`;
  static readonly DOWNLOAD_TEMPLATE_BASE_LINK =
    environment.baseTemplateDownloadUrl;
  static readonly OSRM = "OSRM";
  static readonly OSM_TILE =
    "https://mydomain.in/osm/{z}/{x}/{y}.png"
    static readonly OSM_CONTRIBUTORS=
    '&copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors';
  static readonly OSM_NOMINATIM_Obj = {
    url: "https://mydomain.in/nominatim/search?format=json&q={s}",
    //url: "https://nominatim.openstreetmap.org/search?format=json&q={s}",
    jsonpParam: "json_callback",
    propertyName: "display_name",
    propertyLoc: ["lat", "lon"],
    marker: L.circleMarker([0, 0], {
      radius: 25,
      color: "#e93f33",
      opacity: 0.8
    }),
    animate: true,
    autoCollapse: true,
    autoType: false,
    minLength: 2
  };

  static readonly OSM_NOMINATIM_Obj1 = {
    url: "https://nominatim.openstreetmap.org/search?format=json&q={s}",
    jsonpParam: "json_callback",
    propertyName: "display_name",
    propertyLoc: ["lat", "lon"],
    marker: L.circleMarker([0, 0], {
      radius: 25,
      color: "#e93f33",
      opacity: 0.8
    }),
    animate: true,
    autoCollapse: true,
    autoType: false,
    minLength: 2
  };

  static readonly OSM_ROUTING_URL = "https://mydomain.in/route/v1";
 
}

UsedComponent.ts

 getCurrentUser() {
    this._mCurrentUserData = this.serviceLocalStorage.getUserObject();
    if (this._mCurrentUserData != null) {
      this.initForm();
      this.getLocation();
      this.getRoles();
      this.getProjects();
      this.getBusinessUnits();
      this.getCategory();
      if (this.mapType === Constants.OSRM) {
        this.map = new L.map("user-map", {
          fullscreenControl: true
        }).setView([15.0146, 70.5978], 10);
        L.tileLayer(Constants.OSM_TILE, { attribution: Constants.OSM_CONTRIBUTORS }).addTo(this.map);
        this.map.addControl(
          new L.Control.Search(Constants.OSM_NOMINATIM_Obj1)
        );
        this.loadOSMap();
        this.loadHomePointOnOSMap();
      } else {
        setTimeout(() => {
          this.loadmap();
          if (this.mIsEdit && this._mUserData != null) {
            if (this._mUserData.userInfoDetails.homePoint != null) {
              let homeLocation = new google.maps.LatLng(
                this._mUserData.userInfoDetails.homePoint.latitude,
                this._mUserData.userInfoDetails.homePoint.longitude
              );
              this.setMarker(homeLocation);
            }
          }
        }, 10);
      }
    }
  }

  onMouseOverOnMap() {
    if (!(this.mapType === Constants.OSRM)) {
      document.getElementById("pac-input").style.display = "block";
    }
  }

component.html

<mat-card class="example-map-card">
        <input *ngIf="mapType!='OSRM'" id="pac-input" class="controls map-search" type="text"
          placeholder="Search your place here">
        <div id="user-map" (mouseover)='onMouseOverOnMap()'></div>
      </mat-card>

It is server issue or my code create this type of issue if code will create issue then local and test environment also we got same issue, but I am not getting any issue on local and test environment . problem came on production. How to fixed this problem. please help me for this.