Good to see you post after what seems a long break spree!!!
My Gridcoin main wallet has been wonkey lately the past few days compared to earlier with 3.6.3.0 but I must say per both the Widows and Linux versions are rock solid going on 4 weeks now , thanks to a plethora of contributions over the past few release.. Well , least the windows client and one machine I have coin on seems to be stable software. The Linux clients always no problem , especially if compiled from source just like B.O.I.N.C. and your own Kernel along with video modules.