Routing mark in mangle with rp_filter set to strict

Hi all,
is there a way to have both “rp_filter = strict” and Mangle “routing-mark” working together?
With rp_filter = strict, return packets are dropped, obviously; setting it to loose solves the problem.

Using routing rules instead of Mangle it seems to work keeping “rp-filter = strict” but I’m not able to perform traceroute to external IP.
Any ideas?

Many thanks…

Would also like to know…