Hello and Welcome to MetaMask community,
I encountered a similar issue, and I asked it from the community and I was told that the loading delay has caused it. Please refer to this post: The FTM value on Fantom network was shown as BNB
I encountered a similar issue several times since my last post and as it took over 1 hour for MetaMask to “display” the tokens correctly, therefore, I am not sure that the problem is due to the loading delay.
Despite this fact, since MetaMask considers the correct value when doing transactions under that condition, I did not follow it up again.
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