Hello, I can confirm this is happening on 1.05 stable official server, local region, ping is around 40 - 100. Was using a pistol, shots were going thru zombies, doing no damage, ammo was depleted but I was unable to change the mag. I logged out, when logged back in, was like I never shot, UI was showing that I had bullets inside the mag, but the weapon was empty when trying to shoot, also unable to change the mag, thus rendering the item useless.

In T145293#1964579, @orionellis wrote:

I can confirm that this happens as described on my xbox private server named "orion".

Since we are playing in official vanilla servers, still a bug that need to be addressed to BI devs. Cars and bases are nice stuff that make dying and losing stuff a little less frustating. And these are the two things that aren't working well and becoming useless.

Same here. Happened to my ADA, exactly the same stuff. Ping is around 40 to 100 sometimes. Official servers.