macOS: "Parameter Info" scrollbar obscures parameter at full screen width

Hi,

I'm using the latest version of IntelliJ on macOS Big Sur 11.6.1. My problem: The Parameter Info pop-up shows a scrollbar when IntelliJ takes up the full screen, obscuring the last parameter.

Here's an example:

I tried to resize the pop-up but I only managed to resize the main IntelliJ window.

Now when the screen is not at full screen width, then there's no scrollbar:

So how do I get a proper "Parameter Info" window at full screen width?

Here are my IntelliJ details:

IntelliJ IDEA 2021.2.3 (Ultimate Edition)
Build #IU-212.5457.46, built on October 12, 2021
Runtime version: 11.0.12+7-b1504.40 x86_64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.