skeleton horse traps not spawning

when in creative (mob spawning/griefing, day cycle on)(hard mode)
and setting weather cycle to thunder skeleton horses (horse traps) wont spawn.
pretty simple. i played in a super flat for 3 hours with thunder on and no horse traps spawned. in my pure survival world i get a horse trap with 10 minutes on thunder. like daily.

extra: can we get a spawn egg for the horse traps/skeleton horses? that would be sweeeeeeet no hurry but it would be nice for creative. same goes for husks and strays too in creative they are just a pain to get
ps. sorry for making so many dam bug reports this is like my 30th