I just did some testing by rolling back the flatpak back each version until this feature worked.
The 2.3.14 version (2020-06-09) allows me to select individual paths from the SVG I attached and linked to above without any issue and they display perfectly. The commit I used to roll back to this version is 27e83684c545e26300b04add69c68aa37e8936c73394a4fec5a7b4a7257d97aa
The following newer versions I also tested and they had the bug:
Subject: Fix libheif (36dc6805)
Date: 2021-05-31 18:44:45 +0000
Subject: Build fixes (9d2d744a)
Date: 2021-04-22 20:51:09 +0000
Subject: Move openfx-misc to CMake (fe01f15f)
Date: 2020-06-18 10:54:45 +0000
That first version in the list there is 2.4.0.
So the bug must have been reintroduced between 2.3.14 and the version released 2020-06-18