Problems with the command completion system

This issue affects all historical versions of Java that have an AutoComplete feature. This may not be a bug. I can use the Tab key to AutoComplete commands while typing other commands. But when I type the NBT tag, the Tab key becomes useless and no longer autocompletes as it always does. But this is a problem that everyone may have at the current time, that is, the developer is working on the project, if so, please ignore this feedback. Thanks.