Lxd memory consumption when idle?

I have an ubuntu 18.04 desktop with 12GB of RAM.
This morning I noticed a dialog saying Chrome had crashed, but the system didn’t have enough free ram to analyze it. Evidently 12GB isn’t enough for whatever I’m doing. After killing off the apps, I looked at ps to see what behind-the-scenes thingy was taking up RAM (RSS), and the #1 user was… lxd. Here are the processes with more than 100MB RSS:

dank      4688  0.0  1.3 1394392 168492 tty2   SLl+ Sep09   0:27 /usr/bin/gnome-software --gapplication-service
dank      4462  4.0  3.1 3814640 381572 tty2   Sl+  Sep09 419:03 /usr/bin/gnome-shell
root      2167  2.3  5.2 1990008 644532 ?      Ssl  Sep09 246:03 /usr/lib/lxd/lxd --group lxd --logfile=/var/log/lxd/lxd.log

Half an hour later, lxd’s vss and rss had both increased:

root      2167  2.3  5.3 1991324 649188 ?      Ssl  Sep09 247:17 /usr/lib/lxd/lxd --group lxd --logfile=/var/log/lxd/lxd.log

Being someone who still remembers buying 16Kb DRAM chips, it’s somewhat horrifying to me that a daemon I’m not even using, at all, is taking up over half a gigabyte of RAM.

Wuffo is lxd using some much RAM in between doing its periodic image update tasks? Is it leaking?

dank@thinky:~/oblong$ lxd --version
dank@thinky:~/oblong$ apt-cache policy lxd
Installed: 3.0.1-0ubuntu1~18.04.1

3.0.1 is known to be leaky, 3.0.2 fixes that, so would switching to the snap to get either 3.0.2 or 3.4.