By chance have you had a problem with any other
juice tasting the same or is it just this one? I'll just toss out a few things.
Sometimes our taste buds can get used to a flavor and ya just need to try something different for a bit, like a minty flavor. Other times drinking some water with lemon can work for some, or using a tongue scraper and a mouthwash like Biotene for others. And then other times we just go through periods of dead taste where your buds are just cycling out. Not fun not being able to taste a thing!
If it's not that then like others have said, the weather where boB is at while he's mixing could also affect the viscosity or the molecules doing their thing. Thicker liquid (ones with higher VG) will take a bit longer to get the flavor in it. Given the lack of hotter weather in some states during this time of year, things don't get the time to mix like they usually would during transport.
You could try accelerating the steeping process with hot water. Heat thins the liquid allowing the flavors to get in. What you do is fill a cup, like a coffee mug, with hot water. Put your bottle in the cup and let it sit with the cap on. Pull it out and shake it every so often. Then let it cool to room temp.