I tried a different widget, toc but the delay is still present, though the delay is much shorter than before. But it is not instantaneous.
<<toc-tabbed-internal-nav tag:"fish-shell" selectedTiddler:"$:/temp/tb5-tabbed-toc-example" unselectedText:"Select a topic in the table of contents to the left.<br>Click the arrows to expand topics." >> -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to tiddlywiki+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/5184bdb2-5392-45db-8118-113a4e8301a0o%40googlegroups.com.