Drum Machine extremely laggy when triggered with mouse

Hello

New to Cubase : )

Can anyone replicate this:

If the Drum Machine pads getting triggered rapidly with the mouse (pointer), everything becomes extremely laggy.
Even the track meter get stuck. Performance meters looking normal during the laggyness, no spikes. Try eg drumset “Summer”

Not at once, you´d have to click arround for a while, maybe 15 seconds.
But then it´s on and does not go away until I restart Cubase.

Audio Content is stored on a fast SSD.

It doesn´t occour when triggered via midi controller.

Occours with internal audio (Macbook) too

I don´t know if it´s related, but I found out about this after installing Blackhole. But it´s deinstalled now with the official deinstaller and machine rebooted.
I only test arround stuff since I own it only for a few days.

Another strange thing, buffer 2048 gives very bad performance, with Asioguard off its full of crackels. Not so in lower settings.

Using various DAWs on lots of systems since 1997.

Fireface UC (Buffer 512), Macbook Pro 2022 M1 32 GB Sonoma 14.4.1
Cubase Pro latest.

I got the same problem. I am on a Mac mini M4 and everything is updated. With the mouse clicks on the pads I can get Cubase to lag so much that it seems to be frozen. I also have problems when I work on the drum machine track with drum part items. The playhead sometimes jumps visually and entering or deleting notes also causes a lag.

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