https://bugs.winehq.org/show_bug.cgi?id=48197
--- Comment #11 from eeknaak@gmail.com --- I tested 6.20 64bit wine with: OS: Ubuntu 18.04 64bit playonlinux: 4.3.4 using system wine version 6.20
used playonlinux only as a graphical way to run wine.
Followed steps on comment 3. There was no noticeable memory leak from looking on system monitor.
I think I would consider this resolved.