"Plain English" in Option wouldn't stick

Is it just me? When I enable “Plain English” in Options, it wouldn’t stick. When I reopen Options, it’s off again. The same is true for “Misused terms…”

These categories cause some problems. Refer to [en] For category PLAIN_ENGLISH, GUI does not find an error if default=off in grammar.xml · Issue #421 · languagetool-org/languagetool · GitHub.

I see. Thanks. So, it’s now just a display issue. Am I right?