hmm....this is strange. i also hv wifi problem on 18/7. Out of the blue, I just cant surf net, whatsapp and fb on my note 4 even though it says wifi is connected. my wife's iphone and ipad hv no issue at all, I tried restart my note 4 a few time but still no help. In the end, i only got back my line after i reset my wifi router and modem. BTW, i'm on stock rom

arrow,

Not sure if it is the same case, I hv the same problem as you, not with the s planner but with the s note action memo widget keep missing. I solved it by turning on both 'transition animation scale' and 'animator duration scale' under developer option setting to 1x. Never hv that problem anymore since then