Is this a big issue? Really? Surely this reduces the impact of "ghosting"(spectating one team and giving info to the other), as you can't see if they have ammo or not. Also, spec is disabled on most servers nowadays... So is this really a bug? I'd call it a feature...
Is any of what you just said relevant? So what should I just not reporting things because "they're not a big issue"? Come on man you should know better...
I think certain HUD elements were ported to the JS implementation. This is probably a result of those changes.
The real problem with ghosting is conveying information about positioning, numbers, and key research items, not exact combat effectivity. Not seeing ammunition not only has minimal impact on ghosting potential, it also rids actual spectators of information they should have access to for completeness' sake. This should have been reported, this should be addressed.
