Submitting to Stellarmate support and Jasem solved this in a few hours.

Latest builds have this fixed.

stellarmate@stellarmate:~ $ dpkg -l | grep kstars
ii kstars-bleeding 6:3.4.2-stable~202002292034 armhf desktop planetarium for KDE
ii kstars-bleeding-data 6:3.4.2-stable~202002292034 all data files for KStars desktop planetarium
ii kstars-bleeding-dbg 6:3.4.2-stable~202002292034 armhf debug information for the desktop planetarium for KDE

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