When I try to delete a file using the downloads app (Android 8.1 app), I sometimes get the notification that my file couldn't be deleted and subsequent message by tapping the notification that my file wasn't deleted. 

[<img src="https://i.sstatic.net/4xI2G.png" width="210" height="350" alt="IMG: " title="">][1]
[1]:https://i.sstatic.net/4xI2G.png 
[<img src="https://i.sstatic.net/GWGaQ.png" width="210" height="350" alt="IMG: " title="">][2]
[2]:https://i.sstatic.net/GWGaQ.png 





 (click to enlarge)





But after this, the file is nowhere to be found in the downloads app, even when using a file explorer like Files Go or ES File explorer. I wonder what happened, whether my file got deleted or if not, then where is it? 

I am using Nokia 3.1 Android version 8.1.0 Oreo. 
This problem has been there since my phone was new and had Android 8.0 Oreo.

Any help is much appreciated.