Synergy 3 RC 2: Shift/Alt key chords don't work right with non-Mac server and Mac client when Alt/Super are swapped for the Mac (regression from Synergy 1.14.6)

[posita]

Version: Synergy 3 RC2
Server: Ubuntu LTS 22.04
Client: Mac OS 12.6.8

For text selection on a Mac, Command-Shift-Left Arrow (⌘⇧←) and Command-Shift-Right Arrow (⌘⇧→) work like Shift-Home and Shift-End on other platforms (text is selected from the cursor to the beginning- or end-of-line, respectively). However, when a Mac is the client, if Super/Alt are remapped, those chords don't always work. If the Shift key is pressed before the mapped Alt key, the Alt modifier is ignored. This is a regression from Synergy 1.14.6 (where this all worked as expected).

✔️ as expected

On the Mac client with no swapping, press order (press keyboard Super, press keyboard Shift, tap Left Arrow, tap Right Arrow, tap Left Arrow, tap Right arrow, release modifiers, tap Left Arrow):

✔️ as expected

On the Mac client with no swapping, press order (press keyboard Shift, press keyboard Super, tap Left Arrow, tap Right Arrow, tap Left Arrow, tap Right arrow, release modifiers, tap Left Arrow):

✔️ as expected

On the Mac client with Alt and Super swapped, press order (press keyboard Alt, press keyboard Shift, tap Left Arrow, tap Right Arrow, tap Left Arrow, tap Right arrow, release modifiers, tap Left Arrow):

❌ NOT AS EXPECTED

On the Mac client with Alt and Super swapped, press order (press keyboard Shift, press keyboard Alt, tap Left Arrow, tap Right Arrow, tap Left Arrow, tap Right arrow, release modifiers, tap Left Arrow):

[SymlessBot]

[Bot] Added to Synergy's internal issue tracker with ID: SYNERGY1-1662

[posita]

Not sure if this is related: https://forums.symless.com/topic/6842-synergy-3-install-report-and-keymappings-win-macos-issue/

UPDATE: After enabling the Meta key, the following client configuration on the Mac acts as a work-around, but I still think this is a bug.