Problems running amiberry since a manjaro update

Raspberry Pi 4, Manjaro Linux 20.12 updated, running amiberry V3.3

Hello today i installed a fresh Manjaro Linux on my Raspberry Pi 4. There i use the amiga emulator “amiberry”. My problem is that while amiberry is running, there are always short pauses of 1-2 seconds while the program is idle. Neither the mouse can then be moved, nor can you write a command in the amiga shell. What can that be?

I had set up the system again because I had the problem on my previous Manjaro installation after a Manjaro update.