PR #7031 refactored how voidsuits/rigs are fitted to species
A side-effect was that Nevrean-based species now use default Human sprites, and while suits seem to work, voidsuit helmets can no longer be worn by Nevreans - particularly the Mining one from what I can tell
Even if they were able to wear the helmet, Nevreans can have large beaks that protrude quite noticeably through the front - might be best to stick with the Unathi sprites
c76760aaf613aa7440c9d673686b99c72607c0bb
Noticed this when mining as a Nevrean-based custom species today. Luckily a coworker bailed me out with a hardsuit.
Confirmed the missing species allowance thru view vars

Far as I'm aware, per discussion in Virgo dev channel https://discordapp.com/channels/173831852602294272/187013248309002240/696542504304246804, Nevrean use human voidsuits. And Zorren/fennec custom species for Vulpkanin.
Thanks for posting that, I'll rewrite the issue
Edit: Haven't been on the discord until now, woops
Seems like somethings not setting the species restrictions correctly for the helmets, I will fix that right away.
Thanks @Novacat!