Not a Problem
When using "Solve[]" to solve an inequality, you cannot go back and change the inequality-sign. Example:
solve[2x<0]
-> {x<0}
If I now try to go back into the original written equation and change only the direction of the inequality-sign and press enter: it resets the entire program, deleting everything I've done.
EDIT: Updated GeoGebra: now it seems to work...!:)
The same problem 
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