Slow formatting with VSCode Qt Qml extension

With the latest (pre-release) version of the extension, as well as the release version, formatting is often very slow. Formatting a simple file (attached) takes over 21 seconds:

[Trace - 1:06:11 PM] Received response 'textDocument/formatting - (7)' in 21544ms.

Based on the log (qmllstrace_slow.txt), it looks like this is because the extension indexes the file several times before completing the formatting. If I make an edit, then do nothing and wait for the extension output to stop, and then format, it's very fast (qmllstrace_allow_settling.txt):

[Trace - 1:13:28 PM] Received response 'textDocument/formatting - (24)' in 2ms.

There is a mention on https://bugreports.qt.io/browse/QTBUG-129432?focusedId=886366&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-886366 which sounds like this problem is fixed, but I'm on the latest version of the extension, with the latest qmlls (according to the "Qt: Check for QML language server update" command, version listed is 0.2) and it's still slow. Is it just that the update hasn't been deployed yet? Or is this a different problem?