i saw a thread of this before but i repost it again coz its still not fixed 

Bugs :
You still can special summon another non-machine monster during the turn you use cyber dragon drei's effect.


Drei's effect
When this card is Normal Summoned: You can have the Levels of all "Cyber Dragons" you control become 5. You cannot Special Summon any monsters during the turn you activate this effect, except Machine-Type monsters. If this card is banished: Target 1 "Cyber Dragon" you control; it cannot be destroyed by battle or card effects until the end of this turn. This card's name becomes "Cyber Dragon" while it is on the field or in the Graveyard.

you can test it yourself if you dont believe it,
just special summon 1 solar wind jammer and normal summon 1 cyber drei and use its eff become level 5 and xyz summon non-machine type monster.
(i'm using Lan and AI tho)
Read the last post in that thread. This issue is only in offline modes and if you want to fix it just replace the old script with the one in that thread.

We should hopefully have that script put into the next version so it works offline to start with.