Weird Edge not responding and RAM eating behaviour 2

Hello again. Now this is part two of the Edge incredible behaviour of eating RAM and this time I have pictures! Jokes aside, this time I had similar experience to the last time I had with this behaviour last year. Here's link to the post last year: Weird Edge not responding and RAM eating behaviour

This time I just have two tabs opening YouTube videos, one is playing music videos and the other is a video pausing. While I was listening to the music and nearing the end out of sudden the video started to buffer. At first I thought is my internet connection so I checked it with my phone I found out there are no connectivity issue. Then I clicked on the browser again to find out the UI is not responding though the window is still working as I still able to minimize and maximize. 

I opened the task manager to see what is going on the I found this: 

Edge is eating up 4.5 GB of memory while its UI is not responding. After I left it sit for a while, the browser is then back to normal. All webpages are working correctly and no issue afterward. Task Manager also shown the result as this: 

The version of Microsoft Edge I am using is Version 91.0.864.1 (Official build) dev (64-bit).