2 issues with UTM 9.4 (kind of traffic shaping / web filtering issue)

Hi all.

I've been using sophos UTM on a dual Gig port computer with 4Gb of RAM, SSD and Core i3 CPU for months now without issues.

My Internet access if fiber (from french ISP Orange) 300Mb/s download and 100Mb/s upload.

I've upgraded to version 9.405-5 few days ago and since then here are the 2 issues I'm facing:

- my download and upload speeds are limited at around 90Mb/s (if I bypass the UTM I get back normal transfer speeds)

- web browsing with WebFiltering active is almost impossible as web sites do not respond in a random way

For the first issue, I have trid to deactivate a lot of options but I'm stuck at 90Mb/s

For the second issue I've deactivated the WebFiltering option but this is not an aceptable solution.

Any idea ?