I'm seeing occasional hangs in Thunderbird 128.10.2esr (64-bit) on Macos Sequoia 15.5 when tbkeys:closeMessageAndRefresh is called. I'm using the tbkeys-lite version 2.4.0. I've tried moving to different key bindings, but the result is the same. The command works about 4-6 times, then eventually causes Thunderbird to hang for 2-3 minutes (spinning beach ball in Macos). Eventually the tab closes and things return to normal.