No, that's the expected behaviour. You have to switch your Atari to Hi-Res mode first.
In Hatari, press F12 to open the configuration window, then click on "Atari Screen". In the new window choose "Mono" under "Atari monitor". Click on "Back to main menu" then on "OK", then "OK" again. The emulator will reset into the Hi-Res monochrome mode. You can play the Hi-Res version then.