@burnout426 I had completely uninstalled opera and installed freshly.

I had tried disabling inbuilt opera ad-blocker still the same problem. No extra extensions are installed.

@burnout426 problem solved for me.
I had tried beta version of opera everything is working fine.

After trying opera beta, i found solution for stable opera version too..

I had reset the stable version on my pc. Now the downloading multiple gmail attachments is is working fine.

Final words:
only by resetting the opera this problem is solving.

@poisk777 Thanks for reporting issue still exists after Synchronizie. Me too got the problem again after syncronising.
As @burnout426 said i resetted all my data from sync.opera.com. Now the problem completly gone.

I had followed these steps to backup & restore all my Bookmarks and History before resetting Sync Data from sync.opera.com

Steps To Solve The (Multiple Gmail Attachments Downloadig) Issue Completely:

Backup Syncronised Data:

• Open Windows Explorer. Go to : %APPDATA%\Opera Software\Opera Stable

• Backup these files
  1. History
  2. Bookmarks
  3. BookmarksExtras

Reset Opera Settings and Data:

• Open Opera Setting (Alt+P). Naviagte to Advanced > Restore settings.
• Now Login to sync.opera.com and Reset all the syncronised data
• (Reset Opera ) by selcting Restore settings to their original defaults.
• Close Opera.

Restore (History & Bookmarks):

• Now again open windows explorer. Go to: %APPDATA%\Opera Software\Opera Stable

• Replace previously backuped 3 files (History, Bookmarks, BookmarksExtras)

• Now Open Opera Syncronise opera with your account. All the data (History, Bookmarks & BookmarksExtras) we have resored previously will get syncronised online.

@poisk777 Thanks for reporting issue still exists after Synchronizie. Me too got the problem again after syncronising.
As @burnout426 said i resetted all my data from sync.opera.com. Now the problem completly gone.

I had followed these steps to backup & restore all my Bookmarks and History before resetting Sync Data from sync.opera.com

Steps To Solve The (Multiple Gmail Attachments Downloadig) Issue Completely:

Backup Syncronised Data:

• Open Windows Explorer. Go to : %APPDATA%\Opera Software\Opera Stable

• Backup these files
  1. History
  2. Bookmarks
  3. BookmarksExtras

Reset Opera Settings and Data:

• Open Opera Setting (Alt+P). Naviagte to Advanced > Restore settings.
• Now Login to sync.opera.com and Reset all the syncronised data
• (Reset Opera ) by selcting Restore settings to their original defaults.
• Close Opera.

Restore (History & Bookmarks):

• Now again open windows explorer. Go to: %APPDATA%\Opera Software\Opera Stable

• Replace previously backuped 3 files (History, Bookmarks, BookmarksExtras)

• Now Open Opera Syncronise opera with your account. All the data (History, Bookmarks & BookmarksExtras) we have resored previously will get syncronised online.

@burnout426 problem solved for me.
I had tried beta version of opera everything is working fine.

After trying opera beta, i found solution for stable opera version too..

I had reset the stable version on my pc. Now the downloading multiple gmail attachments is is working fine.

Final words:
only by resetting the opera this problem is solving.

@burnout426 I had completely uninstalled opera and installed freshly.

I had tried disabling inbuilt opera ad-blocker still the same problem. No extra extensions are installed.

Me to facing this issue.

could not download multiple files from the gmail

Steps to reproduce the problem:

1. Login to www.gmail.com
2. open an email containing at-least 4 attachments (any .jpg , pdf , ..etc)
3. Download the attachments individually.

Result:
only first attachment is downloading. Remaining are not downloading.

Expected result:
all the attachments has to be downloaded individually.

this is happening only on the opera ( chrome firefox and other browsers are working fine)