Repeated temporary system slowdown in calls on Ubuntu

Dear Zoom community,

for the last few weeks I have been experiencing severe system slowdowns during Zoom video calls on Linux. In Zoom meetings, it suddenly happens that the interaction with all programs becomes laggy. I'm hoping someone can point me toward better diagnostic tools or steps to understand what's going wrong.

Setup:

• Lenovo ThinkPad T15s Gen 5 (Intel Core 7 164U, 64 GB RAM)
• Ubuntu 24.04, kernel 6.17.0-29-generic
• Latest Zoom client Version 7.0.5 (3034). Over the last few weeks, I have repeatedly updated the Zoom client to the latest versions when they appeared in the hope that these would resolve the problem, but without success.

Problem description:
During video calls, it suddenly happens that the interaction with any program becomes slow and laggy. This stays for ~60 seconds before everything returns back to normal. The slowdown returns every few minutes without any visible triggering event. Looking at htop, I can see the Zoom client spawning 15-20 processes with individual CPU usage between 40-70%, resulting in a temporary load average around 18 on a 14-core machine. RAM usage is far below the capacity.

The slowdown happens both in calls with three participants as well as larger calls, with and without screen share. The slowdowns happen regardless of whether I have my camera and microphone turned on or off. The same setup used to work flawlessly a few weeks ago.

Looking at the kernel logs, this message pops up often (but not always) around the time when the slowdowns occur:
Jun 08 11:11:23 laptop kernel: workqueue: acpi_ec_event_processor hogged CPU for >10000us 19 times, consider switching to WQ_UNBOUND

Any pointers to debugging tools or approaches would be really appreciated.

Thanks!