https://bugs.winehq.org/show_bug.cgi?id=45160
--- Comment #3 from Ken Sharp imwellcushtymelike@gmail.com --- (In reply to KOLANICH from comment #0)
You should really consider throwing JS part of Bootstrap into garbage and using pure HTML+CSS solution.
Definitely agree with this bit. Won't be a small job to rewrite the whole thing though.
Cloudflare (for example) could help with bandwidth.