Squarespace have confirmed this as an issue that has been reported to the Engineering team so that it can be fixed. However, if you are affected by this, I strongly recommend that you contact Squarespace Customer Care and report it to them again.
Posting in the forum will not help to make Squarespace employees aware of the issue as they do not routinely respond to requests for support via the forum (see item 6 of the forum guidelines).
