[bug]: Helium HNT wallet app shows very different HNT to fiat exchange rates for different wallets

### bug

I just found out with a few other people that the fiat price for HNT shown in the Helium HNT wallet app varies strongly (from person to person and wallet to wallet, in parts on the same app with different wallets). This appears to not be a simple time lag:

At the moment, the HNT price is roughly €2.9.
In one wallet connected to my app, it shows €1.42, in another wallet connected to the same app, it shows €1.65. Other people report the price being shown being roughly correct atm, still another report prices that are off in similar ranges.

UPDATE:
After having the app open with one wallet selected for a few minutes, the price updated to the correct price.
So it might be the app takes the exchange rate from the last time one has opened a wallet in the app and takes *very* long (many minutes) to update? Also: the calculated fiat value of HNT holdings in a wallet seem not to be affected. For that calculation, the current HNT to fiat price appears to be used right away. It appears, the outdated HNT price hasn't been used to do that calculation.

### Transaction Hash

_No response_

### Phone Type

Pixel 4a, Android 12 // iOS

### Network Type

Mainnet