When looking at youtube videos, the number of dropped frames have increased between 2 versions of Webengine.

Old Qt version used: 6.6.2

New Qt version used: 6.7.3

If going to a youtube video and looking at in fullscreen, the number of dropped frames has increased. Previously, it was perhaps <10 frames dropped  10000.
Now it can easily reach >2000 frames

Chrome://gpu (see attached chrome_gpu.png)

Are identical between the 2 versions.

The kernel is fixed between the 2 versions.

Besides Qt components changing, the remainder of the system is kept static.

Platform: iMX8MP

Any idea what the problem might be ?