I use to build rpms of OpenCPN
I did this for OpenCPN
5.6.2 and its plugins
Built upon wxgtk3.0 everything works fine
But I found that building upon wxgtk 3.1.5 induces some problems that may appear in the next versions of flatpak builds (with wxgtk 3.1.5)
needs a patch to be built (Climatology_pi : I provided this patch in github)
I tested the stuff by installing plugins one by one (this is possible with a classical install)
1) When Logbook_pi is installed OpenCPN works but after having activated this plugin
the simple fact of clicking on its icon in the icons tray induces a segfault
2) Worse the simple fact of installing the rpm
of s63 induces an immediate segfault when launching OpenCPN (installing this plugin should add a line in the plugins tab of OpenCPN settings but something seems to go wrong for this)
The problem of wxgtk 3.1.5 is that it is not retro-compatible with wxgtk3.0
some instructions that worked well for wxgtk need to be rewritten !!!
OpenCPN is not alone to be impacted...