GarageSales stops uploading midway after scheduling

Hello, I list more than 100 items on ebay per day. I create an event and just wait for the items to upload.

But in the recent days, the items gets stuck and then stops uploading the rest of the way. For example, It would start uploading 4pm with two minutes interval. And then I check 2 hours later, only to find out the system stops uploading at 4:10 with only 5 items uploaded and rest is stuck. I tried with 2 different internet connections, so I know it’s my internet problem.

It would not show any errors, could someone please help me??

Best Regards,