At this Topic History page: https://www.mediawiki.org/w/index.php?title=Topic:Sdoatsbslsafx6lw&action=history
it is currently missing the history entries after my post.
They are shown in the Board History (and Recent Changes) though:
https://www.mediawiki.org/w/index.php?title=Talk:Flow&action=history
2nd example: https://www.mediawiki.org/w/index.php?title=Topic:Sdph5ltdhgk25057&action=history
vs Board: https://www.mediawiki.org/w/index.php?title=Talk:Sandbox&action=history
[Brief investigation: It only seems to be a problem for Topics that were started recently.
Older topics, with recent-replies, are updating as expected. eg https://www.mediawiki.org/w/index.php?title=Topic:Ro4jv3rutpwm9x8k&action=history