Map editor bug.

I use the original CD from the late last century and a pirated CD "Heroes III - Heroes II - Heroes I" from the beginning of this century. I'm not going to download anything because I'm afraid that what I download will not be compatible with Windows 95, Windows 98, Windows 2000, which I use. Initially, I created maps under Windows 95 OSR2, but I switched to Windows 2000 for convenience. I am interested in using the original maps from there - due to their limited number. As you can see, one or two maps are enough for me to implement my ideas, which is why I don't "expand" so as not to lose the sense of limitation.