Did had a experimental weapon in hand and carried only experimental ones on me at the crafting station. Switching to the new crafting menu it start to act odd, just a little first with just blank lines to the left side and I remembered that Exp. shouldn’t be able to be upgraded.
Then it gets worse doing it several times unconsciously for a few hours for example when I got a notice that I researched another level of something and wanted to unlock it. With different/same experimental ones on me again (Block, K-pist, M59) and the game start to spit out more and more crazy things, broken crafting menus, showing wrong items looting and just getting worse every time I been in the crafting station.
Restart of GZ and all is normal again.
Doing it again carrying only Exp. weapons it all start over again all the way until it gets fubar and feels unsafe to play any longer.