Slow download speeds from remote location since outage

Hi
Don’t know if anyone has run into this problem. Since the WD outage when downloading files from my EX2 Ultra off site, speed start out fast then after a minute or so slow down to a crawl. Like 55kps slow. Often timing out. Internally I can still transfer files without issue. I’ve rebooted. Unplugged for 30 minutes. Same results. Any suggestions would be appreciated. I may do a factory reset next.
Thanks