Lightroom Cloud Export and Smugmug Sync Issues

I have been having consistent issues with exporting batches of photos from Lightroom to my smugmug hosted website. My workflow is to shoot a sporting event or client shoot and edit photos in lightroom/photoshop and then send them to my website on smugmug for client access or athlete purchase etc. Often there will be a couple thousand images, but whether there are that many or just say 80, always 10-30 percent don't transfer and have errors. I spoke with smugmug and they've said it is on lightroom side. So, decided to just export the batch to my hard drive, and then upload afterward to smugmug, assuming the connection with smugmug was somehow the issue. Still the same problem. It's very consistent. I check that app is up to date etc. I'm using windows 11 64 bit. I'm not too computer savy, but I have plenty of processing power and configured the computer purchase around heavy photoshop use so I wouldn't guess that was the issue? Even when I repeat the process with the error files, which takes a lifetime to write them all down and then search file names in lightroom, the problem often repeats itself. I'm not sure what to do.