On every boot, the GNOME widgets including those on the bar kinda get all messed up and distorted for some three to four seconds before coming back to the original look. It also happens with the WiFi picker widget which can be triggered from the GNOME panel - the icons are suddenly large and unaligned for a second or two before getting back to their alignment.
And nope! Theming is definitely not the issue here. I felt back to the default theme and the issue is persistent there as well. Any help with stopping this behavior and insight about why this is happening is appreciated.