PL5 flickering and slowing down with "not responding" message when clicking on the local adjustement badge

Since the migration PL4 → PL5 I suffer from slowdown and erratic behavior (flickering) with the automask tool. It seems that each brushstroke is weighted the mask as a separated mask and not merged with it. It’s no longer usable for me. My graphic card is old (quadro K600) but is not a good reason because I have no problem to manage other adjustements. My raw is only a 12M pixels…

Dear @Deneice ,

I’ve already replied you in a neighbour thread so let’s continue there.

Regards,
Svetlana G.