I'm also having this issue. Seems to affect my gear that takes attachments, like belts and the tactical helmet. I think it doubles the base weight of the gear when something is attached

Confirming with these screenshots.
12kg plate carrier plus 1kg of pouches with 2 mags and some ammo = 25kg total

I do confirm above mentioned problem, too!
I am more than surprised to see a can opener that weights 1 kilo haha

Can opener has weighed 1 kg since the start of 0.63 (don't remember their weight in 0.62). They must be made from osmium or something...

Several items have seriously messed up weights in this update though, empty tac vest and combat pants 5kg apiece, hand held radio 5 kg, a backpack with some food in it 25kg. Something was seriously messed up...

There are other items as well. A Hunter jacket now weighs 5 kilos empty. Assualt vest is 6 kilos empty. A medium tent (the blue festival type tent) weighs a whooping 25 kilos (should not be more than 1-2kg), a pair of BDU pants is 3 kilos, walkie talkie is 5 kios with a battery in it 1 kilo without battery, a KA mag is 1 kilo, while the M4 mag is 0.25 kilos a piece. A tactcal helmet weigs 1 kilo, but add a 0.25 kilo flashlight to it, and it weighs 3 kilos. A school back pack weigs 5 kios empty...the same as a mountain back pack etc

Is there any news about fix for this problem???

In T139773#1874750, @Prki-CRO wrote:

Is there any news about fix for this problem???

Unfortunately there are no news I can share regarding to the issue, however, it is being worked on.
Regards,
Geez

But can't You roll back patch.The glow stick issue was much less game braking than this,and it all started when You tried to fix glows stick bug.