App crashed while browsing large folder: NPE at `OperationsServiceBinder.isSynchronizing` in `getRemotePath()`

App crashed while browsing rather large folder with photos and clips (over 100GB). First it started lagging and finally crashed.

************ CAUSE OF ERROR ************
```java
java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String com.owncloud.android.datamodel.OCFile.getRemotePath()' on a null object reference
at com.owncloud.android.services.OperationsService$OperationsServiceBinder.isSynchronizing(OperationsService.java:372)
at com.owncloud.android.files.FileMenuFilter.anyFileSynchronizing(FileMenuFilter.java:452)
at com.owncloud.android.files.FileMenuFilter.anyFileSynchronizing(FileMenuFilter.java:441)
at com.owncloud.android.files.FileMenuFilter.filter(FileMenuFilter.java:181)
at com.owncloud.android.files.FileMenuFilter.filter(FileMenuFilter.java:125)
at com.owncloud.android.ui.preview.PreviewImageFragment.onPrepareOptionsMenu(PreviewImageFragment.java:378)
at androidx.fragment.app.Fragment.performPrepareOptionsMenu(Fragment.java:3144)
at androidx.fragment.app.FragmentManager.dispatchPrepareOptionsMenu(FragmentManager.java:2923)
at androidx.fragment.app.FragmentController.dispatchPrepareOptionsMenu(FragmentController.java:414)
at androidx.fragment.app.FragmentActivity.onPreparePanel(FragmentActivity.java:447)
at androidx.appcompat.view.WindowCallbackWrapper.onPreparePanel(WindowCallbackWrapper.java:99)
at androidx.appcompat.app.AppCompatDelegateImpl$AppCompatWindowCallback.onPreparePanel(AppCompatDelegateImpl.java:3149)
at androidx.appcompat.app.AppCompatDelegateImpl.preparePanel(AppCompatDelegateImpl.java:1937)
at androidx.appcompat.app.AppCompatDelegateImpl.doInvalidatePanelMenu(AppCompatDelegateImpl.java:2191)
at androidx.appcompat.app.AppCompatDelegateImpl$2.run(AppCompatDelegateImpl.java:273)
at android.os.Handler.handleCallback(Handler.java:938)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loopOnce(Looper.java:226)
at android.os.Looper.loop(Looper.java:313)
at android.app.ActivityThread.main(ActivityThread.java:8582)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:563)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1133)
```
************ APP INFORMATION ************
ID: com.nextcloud.client
Version: 30190090
Build flavor: gplay

************ DEVICE INFORMATION ************
Brand: samsung
Device: p3s
Model: SM-G998B
Id: SP1A.210812.016
Product: p3sxeea

************ FIRMWARE ************
SDK: 31
Release: 12
Incremental: G998BXXU4BULF