Same here. Happens in 90% of the time. I updated Grana to current version, but still happening.
Tried cache clearing, different browsers and incognito tabs. This does not seem to affect it. For me it happens the first time in the morning, when loading my visu for home automation. It seems like grafana goes to sleep over night and needs an extra reload at the first waekup.
edit: same issue here… Embedded panels load incorrectly into homepage / wrong panel - #7 by baddoub
Grafanas never ending problems with anonymous embedding are really ridiculous.