I can tell you we are not using the FileOpen plugin and are on Windows 11.  Since putting the users in Compatibility Mode with Windows 8 the issue stopped happening.  These users luckily are not seeing a downside to this with their job duties, but obviously this is not a permanent solution. ... View more

Compatibility mode seems to be working for us for now...we tried disabling the AppContainer and the issue still occurred. ... View more

We are experiencing the same issue with 1 of our 3 end-users for a particular task.  They are running Windows 11 with Adobe Acrobat Pro latest version.  It seems to be when she is in her browser and clicks to browse to attach a file, and while in there will open the PDF in Adobe Acrobat Pro from the same browsing window and then select it to upload.  It doesn't happen until she's further thru the day and then once it happens you cannot get out of it.  We have toggled the version and the Security(enhanced) suggestion listed by you and still we are not working. ... View more