pixmap memory leak

Hello ! On my freshly (2 month ago or so) installed trinity desktop (4:14.0.5-0debian9.0.0+0) memory usage of Xorg process grows all the time, it's now 66 of available 170 GB virtual memory after 1 day running and in two or three days the system will kill Xorg because the virtual memory will end. Otherwise it works fine. Here is the output of "xrestop" saying that most of the memory is used by KDE Desktop: res-base Wins GCs Fnts Pxms Misc Pxm mem Other Total PID Identifier 1e00000 42 31 0 1654 1674 92369288K 40K 92369329K 77215 KDE Desktop (and yes, I don't know why it shows 92G which is more than 66G reported by htop for Xorg process) Is there any known workaround for this? Please set Cc: to my address, because otherwise gmail tends to lose some e-mails from TDE lists, thanks!