Slow mouse movement only when browser is active
I've got a Logitech MX Ergo mouse connected with Bluetooth (no USB-dongle) and I've got my acceleration settings set to the fastest. But recently when a Safari or Chrome browser is active and I move my mouse pointer it is very slow. As soon as I switch to some other application it is back to full speed.
It started first only while using Safari but today it started for Chrome as well.
It is both the acceleration/speed of mouse movement as well as the scrolling wheel.
I've removed the Bluetooth-connection and reconnected but still the same.
I've got a MacBook pro 2,3 GHz i9 with Sonoma 14.0.
MacBook Pro 16″, macOS 12.6