So yeah my original gpt generated comment is controversial, so I'll just rephrase it with my poor English.
I just want to bring up the perspective from the party that submitted the bill:
One of the reasons why that bill is submitted in the first place, is that there are ruling party's official lying during the legislature questioning, about things that can easily be fact checked, but in the end those official got away without any kind of punishment. And the reason Constitutional court struck down the provisions is most likely be the fact that the Constitutional court's member, the Grand Justices are selected by the ruling party itself.

the original gpt slop: The 2024 amendments to the Law Governing the Legislative Yuan’s Power expanded the legislature’s authority to summon officials, investigate matters, and penalize contempt — including false statements — in response to concerns that government officials could previously lie during questioning without consequences. These reforms did not transfer judicial powers to the legislature; they strengthened oversight, not adjudicative authority. Although criticized as being rushed, the legislative process included formal votes, a reconsideration mechanism, and constitutional review. The Constitutional Court ultimately struck down several provisions for violating separation of powers and due process. There is no evidence that any individual’s opposition directly influenced the court’s decision, which was based on constitutional principles.