Based on the brief description you have provided, it is impossible to issue a blanket answer beyond what is written in the Game Manual that encompasses all possible situations. Any ruling made by a Head Referee must consider the full context of the Match.
However, as described in rule <SG5>,
...because heavy Robot-to-Robot interaction is expected around the Goals, and Entanglement carries a high risk of playing field damage, any Robot that becomes Entangled must be Disabled regardless of fault.
In your scenario, at a minimum the Entangled Robot must receive a Disablement. If the Head Referee determines that their opponent was responsible, the opponent Robot must also receive a Disablement, as also noted in <SG5>:
Causing an opponent to become Entangled with the net is considered a violation of <G15> and, at a minimum, will result in a Disablement for both Teams.
Based on the interactions and actions that lead to the lifting of the net and the resulting entanglement, additional pertinent rules and Violations could include:
- <G7>: Don't clamp your Robot to the field.
- <G13>: Don't destroy other Robots.
- <SG8>: Stay out of your opponent's Goal unless they are Double-Zoned.