You can revert to previous behavior in the short term by following the steps below to enable compatibility mode:
In the search box on the taskbar, type Settings, and then either select it in the list of results or select Enter.
Type IME settings into the search box within Settings and select the IME settings that are appropriate to your language—for example Japanese IME Settings.
Turn on Use previous version of Microsoft IME.
Note: We do not recommend using the compatibility setting for the long term, but rather as a temporary workaround for users who are impacted by this issue.