When closing an interface window within the game whilst typing in Japanese with IME keyboard, the game crashes

[vineet131]

Version of OpenTTD

1.9.3

Expected result

The program shouldn't crash

Actual result

The program crashes

Steps to reproduce

Not sure if something can be done about this but here goes:
I use the standard English keyboard, but since I need to use Japanese often, I have the Microsoft IME for Japanese downloaded. Two things to know: I have enabled the setting where right clicking on a box closes it, and I use the fonts small_font = MS Gothic & medium_font = MS Gothic in the openttd.cfg file so that Japanese shows up properly. So I'm playing normally, and I create one city. I start creating the next city, so I type the "Town name" in the "Town generation" box and I enter 2 characters in Japanese, but then I think Nah that city's not needed. Now if you have used the Microsoft Japanese IME keyboard, you would know it shows suggestions of different kanjis as a dropdown. While that dropdown box with kanji suggestions was active, I right clicked on the "Town generation" box (since I had decided that town was not needed). And right there, my game crashes. I hope this information is sufficient, attached are the dumps from the crash, thank you!
crash.log

[glx22]

Confirmed.