At times, I notice that items that I copy won't be added to the history. Below is what I see in the logs when this happens. If I close and reopen ClipboardFusion, then items are added to the history again. I haven't figured out yet what exactly is triggering the issue.

2019/05/30 09:02:51.5366##_##INFO:L1##_##clipboardfusion.exe:8936##_##frmMainrocessClipboardContents##_##-##_##Path: c:\program files (x86)\google\chrome\application\chrome.exe##_##-
2019/05/30 09:02:51.5406##_##FAIL:L1##_##clipboardfusion.exe:8936##_##ClipboardManager:Add##_##-##_##Object reference not set to an instance of an object.##_##-

As a side note, I see this message in the logs when I start ClipboardFusion.

2019/05/30 09:04:14.4509##_##FAIL:L1##_##clipboardfusion.exe:6036##_##BFPublicData:CurrentDomain_AssemblyResolve##_##-##_##Assembly: ClipboardFusion.resources, Version=5.6.0.0, Culture=en-US, PublicKeyToken=null, Unable to find assembly: ClipboardFusion.resources, Version=5.6.0.0, Culture=en-US, PublicKeyToken=null##_##-

The next time I notice it happening, I will check my history and see about sending it.

I was finally able to reproduce this issue. If I am using Putty for SSH, and then select Whitespace, that will cause subsequent copies not to be added to the clipboard history. Even though copied text will not be added, copying files out of File Explorer will be added. And if it is anything but Whitespace, items will still be added.

Selecting something in Putty copies it. There is no need to deliberately copy text. So if some whitespace gets selected it will be copied.

Mostly correct. Nothing gets added to the history from other applications as well, except for copying files in File Explorer for some reason.

Here you go. I have mRemoteNG as a wrapper around Putty. I went for the complete logging as it didn't seem like minimal was giving a lot of detail when I was looking through it. I tried copying 3 times. If you search for puttyng.exe, the second one corresponds to the whitespace and the third one did not work.

Here is the exception being thrown in the memory dump as well.

System.NullReferenceException
HResult=0x80004003
Message=Object reference not set to an instance of an object.
Source=System.Windows.Forms
StackTrace:
at System.Windows.Forms.DataObject.SaveDataToHandle(Object data, String format, STGMEDIUM& medium)

Same thing with Putty on its own.

Here you go.