Starting at v1.9.9 which is included in the dunfell branch, haveged added PrivateTmp=true to the fedora.service that meta-openembedded ships.

see: jirka-h/haveged@8cb8a14

This change causes a cyclic error on startup and haveged does not start:

Sep 22 21:13:06 xxx systemd[1]: haveged.service: Found ordering cycle on systemd-tmpfiles-setup.service/start
Sep 22 21:13:06 xxx systemd[1]: haveged.service: Found dependency on systemd-journald.service/start
Sep 22 21:13:06 xxx systemd[1]: haveged.service: Found dependency on haveged.service/start
Sep 22 21:13:06 xxx systemd[1]: haveged.service: Job systemd-tmpfiles-setup.service/start deleted to break ordering cycle starting with haveged.service/start

The haveged team reverted this change in v1.9.10 just 2 days after the broken v1.9.9 release:

jirka-h/haveged@2098470

meta-oe master branch uses a good v1.9.13 version. Backporting this change to dunfell should be considered, as the package in dunfell is mostly broken.