I had disabled the scroll bar because I use infinite scrolling all over the app, and the scroll bar was jumping around like crazy as more content loaded. In addition, some pages had scroll bars, but shorter page did not - so as I clicked between pages there were layout shifts as the scrollbar appeared then disappeared.

How do other solve this? Based on the reactions here, it seems like hiding the scroll bar may not be the best approach.

Let the scrollbar jump around like crazy. That's what most other infinite-scroll websites do. It's a nice indicator of how long you've been scrolling for.

It's funny how something so simple & essential like a missing scrollbar can be an instant deal-breaker.

not on Safari either. Maybe an intentional choice?

It's a light purple bar within the dark purple bar on the right. Not sure why the design is like this.

The OP describes it as "modern UI", and that's exactly the type of stuff you're seeing.

Nor on Chrome.

Seems fine on lynx. ;)