Timeline preview image/audio wave disappear during playback with scrolling

Hi guys, I am form Hong Kong, new to this forum and new to FCP.

I found that whenever I scroll around the timeline while playing the video clip, the preview image (thumbnail) / audio wave will disappear. If I pause the playback, all the image/audio wave comes back in the timeline immediately. Then if I scroll the timeline back and forth for a few times, and start the playback again, the image in timeline sometimes can be shown even the clips is playing (but the audio wave will not stay no matter what). Please take a look at this two YouTube clip I uploaded to get a better idea of what my problem is.

Clip 1
Clip  2

wonder if it is caused by CPU/GPU/RAM performance or it is just how is work in FCP.
I got the Macbook Pro M2 pro base model with 16GB RAM.

Sorry for my bad English.

Sorry the clip wasn’t properly uploaded before. Here they are:
Clip 1
Clip 2

It's been like that for as far as I can remember. Quite annoying...

Unfortunately, the audio waveforms and video thumbnails disappearing during playback (when you scroll to a new section of the timeline) is – and has been – an annoyance for many years. I edit on a Studio Ultra with 64GB. It is not your computer.

It’s by design. The application applies all system resources to playback not to redrawing the interface. There is a function in Command Post that allows you to bypass this feature. 

Thank you for the replies! At least it wasn’t my computer…

Someone who owns a MacBook Pro M1 Max 64GB told me it was my computer not being powerful enough….