Just as the video shown, such phenomenon is not showing in older version.

1.56

1.59

Is that the content pack's problem or what else?

Yeah that looks like a bug, could you send me the content pack used? You can either upload it here or send it on our Discord.

The pack is too big, I couldn't upload it, it's the link of the file.
https://www.mediafire.com/file/xd6fu6e1i8k1w8k/Warfare44ContentPack-_Version_3.2.jar

@GoldSloth The build 1.5902 you send me fix most if not all problem in this post.

Yep, it solved my problem. I'll close it.