this code works:

        homeService.setHome(playerId, homeName, location).thenAccept(result -> {
            sender.sendMessage(switch (result) {
                case SetHomeResult.Created() -> messageService.homeCreated(homeName);
                case SetHomeResult.Replaced(var oldHome) ->
                    messageService.homeReplaced(playerId, oldHome);
                case SetHomeResult.LimitReached(var limit) ->
                    messageService.homeLimitReached(limit);
            });
        });

on the other hand, this code:

        homeService.renameHome(playerId, homeName, newName).thenAccept(result -> sender.sendMessage(switch (result) {
            case RenameHomeResult.Renamed(var oldName) -> messageService.homeRenamed(oldName, newName);
            case RenameHomeResult.NotFound() -> messageService.homeNotFound(homeName);
        }));

does not compile

Reproducing Steps:
Use CompletableFuture.thenAccept with an anonymous inner function that uses a switch expression as an argument to another function. If this is relevant, the value being switched over is of the type of a sealed interface.

Workaround:
Wrapping the switch expression in a block resolves the issue.