Hi TervorGraham,
This might be related to web portal layout. When in Report Builder, the layout information is based on xml, after deploy on server, it will also caused by browser layout

This seems to be default, you might need to modify it manually.
I suggest you could submit this requirement on feedback, If the requirement mentioned by customers for many times, the product team may consider to add this feature in the next SQL
Server version. Your feedback is valuable for us to improve our products and increase the level of service provided.
Best Regards,
Zoe Zhi
MSDN Community Support
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