Mouse movement very slow and erratic

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After upgrading to Ubuntu 22.04 on my Raspberry Pi, I started to receive the following errors in /var/log/Xorg.0.log:

[ 17585.599] (EE) event2 - 2.4G Mouse: client bug: event processing lagging behind by 727ms, your system is too slow
[ 17585.599] (EE) event2 - 2.4G Mouse: WARNING: log rate limit exceeded (5 msgs per 60min). Discarding future messages.
[ 17607.204] (II) event2 - 2.4G Mouse: SYN_DROPPED event - some input events have been lost.

I have LXDE and this kernel version:

$ uname -a
Linux raspy4 5.15.0-1024-raspi #26-Ubuntu SMP PREEMPT Wed Jan 18 15:29:53 UTC 2023 aarch64 aarch64 aarch64 GNU/Linux
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