While testing autosync changes for bug 1776823 in daily I noticed that if I try to copy or move multiple messages within a maildir based account, only a single message is copied or moved when multiple messages are selected. I don't see this problem with mbox based accounts.

I tried shelving all my autosync changes from daily and see the same problem. This works OK with latest 102 release.

I selected 11 messages with UID 1 to 11 on a Cyrus based imap account and copied them to a folder called "copied-to" and see this imap request:

109 uid copy 11 "copied-to"

I should see something like this:

109 uid copy 1:11 "copied-to"

The "onlinecopy" URL that triggers the imap command also only requests that a single UID be copied.
The same problem occurs for URL "onlinemove" and the resulting "uid move" imap command.

The only recent bug I see involving moves/copies is this: Bug 1787963

The only recent bug I see involving moves/copies is this: Bug 1787963

Lot of discussion there about whether more needs to be done but backing out the changes there has no effect on this bug. So something else seems to cause this failure to copy or move multiple messages.

See also Bug 892424

Not seeing this now with daily 113.