Platform:
Xbox Series X
Video or screenshots:
What you were expecting to happen, and what actually happened:
Expected to buy able to buy the 2nd pack after the first one. Instead the pack’s price increased and an error occurs.
Steps to make it happen again
Buy level pack 1 and try to buy the level pack.
How often does this happen? When did it begin happening?
Can happen once on an account. Persists after game restart and console reboot.
Just look at the price. I also wanted to report this, but it’s probably not a bug. 
I think it was $30 before buying the first pack.
I didn’t buy the 1st pack and still had 3k right from the start on the 2nd. No other price before.
ive reported both the wild price (which should be visual only) and the error
does it change at all after closing out of the game completely?
Both not being able to purchase and the price visual issue
Yes. I even restarted the console to no effect.
These level up offer packs are unavailable on Switch.
Just like many, many other offers that will probably never be available…
Not a bug, also announced earlier and is in the Known issues article. They are with Nintendo awaiting to be processed after approval.
They are probably still contemplating whether they want to allow microtransactions higher than $1000. 
One curious thing in the screenshot above showing two packs, the left one is in different currency than the right one. I’m not sure how the game could possibly get confused about currencies halfway through processing the offers page, but that would probably a good point to start when analyzing the issue.
I noticed that this was fixed this morning.
