I used insider build v0.13.32.
I encountered the blank line problem temporarily, but v0.13.32 seems to have solved it.
On the other hand, the replace with ATOK problem is still there in v0.13.32.
The installer version is v0.13.31 (Is this the latest version?).
I fully understand that you can’t cover all IMEs.
ATOK is the most popular paid IME, but I think it has fewer users than other free IMEs such as Microsoft-IME.
The behavior I saw was very similar to the problem mentioned in the above link, so I assumed that the same mechanism (I don’t know the details) is occurring elsewhere.
The problem occurs in both LP mode and source mode.