Cannot Send files created after Thunderbird Clint Opened

So I have Thunderbird 128.0esr (64-bit) installed on Ubuntu 24; I have found a strange issue when I try to send emails with attachments. In this scenario, I scan files in from my scanner to a network folder, and then copy that file from the network folder to a final location, where I chose from Thunderbird to "attach" If Thunderbird has been opened prior to the document being scanned and created in the first network folder, if I try to attach it to a email, it does, however, when I try to send I get a error "I do not have permission to access that file"; Strange. I close out Thunderbird, re-open, and try to send the file again, and BOOM, no issues with file permissions. I have replicated this many times. Any ideas? I have tried running "thunderbird" in console to see if any debug information shows up, it does not. And yes, "closing the program and reopening it all-things-equal" always fixes the problem.