Hello, Luis.
Thank you for contacting us. What you describe is the symptom of a Sync Loop, as described in
this section of the Help Book.
You
could have a Sync Loop if you are using
two or more of the following:
•
iCloud > Safari•
Firefox Sync• Google Chrome's
Sign In.
• Opera Sync
• BookMacster on more than one Mac, with a
.bmco file in a Dropbox, iCloud Drive or similar synced folder.
• Xmarks (until they shut down in a couple weeks)
The fix for a Sync Loop is to reconfigure the above services so there are no "closed loops". It requires understanding (1) what you want and (2) thinking through a little "system design". Some system design ideas are in
another Help Book article.
If you want help with your system design, or if you think you don't have a Sync Loop, give us more information – either reply here or
email our support box.
After clearing the Sync Loop, you should remove all of your bookmarks from whatever syncing services you'd been using and, if they are still in your new design, and repopulate onto the clean slate. This is definitely necessary if iCloud > Safari was ever in a Sync Loop, and the procedure is in
this Support article. We haven't have that much bad experience with the Firefox, Opera and Chrome syncing systems, but I would recommend doing a similar procedure if any of them may have ever been involved in a Sync Loop.