Update to 23.7.8_1 from 23.7.4, MTU setting broken?

[Adures]

Some time ago, when I was setting up Openvpn, I had to set MTU to 1492 on my WAN interface to fix problems related to it (like packets needs to be fragmented) general slowness and so on.

After update to 23.7.8_1 I get reply from opnsense that packets needs to be fragmented, but DF set when setting packets bigger than 500 bytes.

I added wanMTU.png, but it seems like currently the MTU setting does nothing?
It doesn't really matter if I put something in MTU field, 500 is the max packet size.

Reverting to 23.7.4 fixes the issue. Has anyone encountered this?