I updated an hour ago. SpdMerlin graph is normal right after Skynet upgrade. The graph remain normal after power cycle. Not sure if there is any changes made in the upgrade package in between. @dave14305 post above mentioned there is a downgrade to v2.9.4.Correction: they're not OK. At least in my case. They might look okay at first glance, but something's wrong with the scale. See this example: min, max, average are of, the date below isn't as before for the 7 days view.
View attachment 33749
This Chart.js v3.2.1 might have downgraded to Chart.js v2.9.4. I am not sure how to check in case you got the v3 copy before the downgrade.