When I create a new file and define a new class, referencing the new class in another file will produce a cannot find <object> in scope error. It persists through builds (which work fine). The menu option to clear issues from previous builds doesn't remove it.
The only way I know to clear this error is to toggle off the Icarus extension and then toggle it on again.
I reproduced this from a fresh launch and watched the extension console, but nothing was emitted there as I added the file and referenced it.
I also noticed that the LSP will crash with a notification if I delete a file, in case that's relevant.