Hi @gitnob !
I just fixed bank creation when saving presets from UI. I think the problem was this.
Please, update and follow this steps to clean up the wrongly saved presets:
rm -rf $ZYNTHIAN_MY_DATA_DIR/presets/lv2/ZynPerfomix.presets.lv2
cd $ZYNTHIAN_UI_DIR/zyngine
./zynthian_lv2.py presets lv2://nobisoft.de/ZynPerfomix
systemctl restart zynthian-ui
After this, you should be capable of saving presets from the UI.
Enjoy!