It’s been awhile since I switched, and I don’t quite remember the details. Here’s a few threads of my issues on pCloud:
https://forum.restic.net/t/restic-rclone-pcloud-connection-issues
https://forum.restic.net/t/pcloud-issues-via-restic-rclone
https://forum.restic.net/t/restic-rclone-pcloud-connection-issues
But TL;DR, I just repeatedly and often had lots of issues. I couldn’t rely on it, so I switched to B2. I haven’t had any problems since. 