Issue with [moonlib/mknob] in Purr-data 2.13.0

Hi! As I raised on the Pd forum, I've had crashes with Purr-data 2.13.0 when trying to save patches containing an [mknob]. This is the case both for patches that were working before, as well as for new, empty patches in which I put only a [moonlib/mknob] object and save. I've had this both on OpenSuse 15.2 and Debian 9.0 with Pd-L2Ork version 2.13.0 (20200802-rev.70066071) installed from https://download.opensuse.org/repositories/home:aggraef. When running purr-data -d 3 and saving such a patch with only one mknob in it I get only this:

<- pd watchdog;
<- x563e8f831110 savetofile mknob.pd /home/zig/PureData 0;
-> gui_post "warning: saving iemgui colors as hex symbol. These colors are readable in Pd Vanilla since 0.47, but they are not readable in Purr Data version 2.12.0 or earlier. If you need to remain compatible with older versions of Purr Data please run in compatibility mode with Vanilla version 0.47 like this:
"
-> gui_post "
"
-> gui_post "[compatibility 0.47(
"
-> gui_post "|
"
-> gui_post "[send pd]
"
-> gui_post "
"Pd: signal 6

It seemed to work find with the previous version, but I'll downgrade tomorrow because I've had to make changes in patches containing mknob and I can't use them anymore.

Let me know if you need more details.