So i may not be right, but this bug causing the HUD to dissapear and appear when i click my left/right mouse button was caused by me trying to make a 100 sun mass black hole i had saved on "MyObjects" from the alpha 8.2, it expanded by 2km, then it dissapeared and the "blinking" appeared.
This also prevents me from clicking anything and the mouse shows a "text" icon thing you see when you hover your mouse over a word.