MBP13 2020 throttling for no reason

[Tony01]

I got my MBP13 replaced because it was overheating like a furnace. This one I got runs cooler.
I copied everything on my new laptop and fired up phpstorm to start working on a project.
Sometimes, for apparently no reason, the macbook will throttle down to 1ghz or less and start lagging hard.
I have connected it to an external monitor.

I have attached a screenshot.

Can somebody help please? I think is a software related issue.
Thanks

 

[LeeW]

What do you mean by lagging hard, the screenshot does not show anything. The CPU is not throttling down to 1GHz, it is returning the power/speed necessary to run what you are asking of it. It may, of course, be an issue but not enough info to say.

 

[jerryk]

What does Activity Monitor show is using the CPU?

Also, does this happen if the external monitor is not connected?

 

[Tony01]

Apparently the problem fixed by itself. I'll update this post if I encounter the same problem again.