Problems after update

Hi This is the second message I am sending.

There seems to be a problem after the recent update, my indicators and drawings just disappear after a while and then I have to reload CTrader just to do it again….

Can you urgently fix this please?

Also please add option in settings where you can change the default lot size, because if you open a new chart if will change the default buy/sell lot to 50.

Thank you