What’s the default pan law in Cubase 10.5 Pro ?
check your project setup. I have equal power as default in Cubase since the last couple of years.
and to learn more: https://www.soundonsound.com/sound-advice/q-what-pan-law-setting-should-use
If you want your panning to behave like most analog consoles available on the market over 40 years or so, then set it to -3dB. This is pretty much considered the standard to minimize “center build-up” with the least amount of compromise.