Please stop flooding my bug report with useless bickering.
It is a bug, a bug that can be easily reproduced, as mentioned above. Personal opinions do not change this fact, and if a developer tried to justify a clear technical issue that way, they'd instantly lose all my respect.
If BW wanted a lore-specific explanation, they would remove Liara's omni-tool, and replace her Electronics skill with a biotic ability. Until then, this is purely a technical matter.
However, due to a limitation in the game's UI, if Liara learns all of her available biotic abilities, the Overload ability becomes hidden in the HUD/Power Wheel. In that situation, Liara will only be able to use Overload if the Squad Power Usage option is set to Active. To avoid this, no points should be invested in the Stasis talent.
(Source: https://masseffect.fandom.com/wiki/Squad_Members_Guide#Liara_T.27Soni)
==> Do not expect a fix for this vanilla ME1 bug.
