I'm sorry for bringing this up again.
Thanks to the commit #13678, the original issue is fixed in the latest version.
But recently, I've found that the new behavior is not very desirable. At least for me.
For example, when I'm in the middle of editing something in Hiragara mode then switch to a different application or make the Terminal lose focus. Then when the Terminal get focus again, the IME's input mode will be switched to Half-width alphanumeric.
It's not a bug, but kind of inconvenience. So may I request a setting to disable the new behavior?

v1.13.10983.0

v1.15.2282.0

I don't have other CJK languages installed, so it might happen with the Japanese MS IME only.

Also, I believe that the new behavior is causing alt + shift to not retaining the last used input mode as mentioned in #13681.

v1.13.10983.0

v1.15.2282.0

Originally posted by @rabianr in #13398 (comment)