Hi @iamameta,
What drivers did you update?
Try rolling back the drivers you updated, one at a time and check if that resolves the problem.
The keyboard controller is pre-programmed but it ''can'' be updated if the BIOS is updated but it doesn’t necessarily have to be if you get what I mean.
Here are the [https://support.hp.com/gb-en/drivers/selfservice/hp-250-g4-notebook-pc/7609933|HP Win 10 drivers] for your laptop just to see if you have the correct ones installed for the laptop.
If the above fails to resolve the problem, it may just be coincidental, the only thing to try then is to replace the keyboard and check. Here’s the [http://h10032.www1.hp.com/ctg/Manual/c04653884|Maintenance and Service Guide] for the laptop, taken from this [https://support.hp.com/gb-en/product/hp-250-g4-notebook-pc/7609933/manuals|webpage].
It details all the necessary pre-requisite steps and the procedures to disassemble the laptop. Unfortunately when replacing the keyboard you have to nearly completely disassemble the laptop as it is part of the top cover assembly.
On p.18 Item #2 (and also on p.22 for the suffix number) you will find the part numbers for all the top cover/keyboard assemblies available for the model. If you search online using the ''part number only,'' appropriate to your particular model, you will get results for suppliers of the part. If you wish to verify that you have the correct part number usually it is located somewhere on the underside of the assembly.