Slow to get nonce in MetaMask

Using the 10.1 release (docker), I've noticed that when I'm using Polygon and I go to submit a transaction, MetaMask pops up and the custom nonce field is empty. It sits there for...2 to 3 seconds maybe, before populating the nonce value.

It's not the end of the world or anything but I can't figure out why there's such a delay in getting the nonce?

I did a LITTLE bit of testing, and subsequent transactions are not as slow, but that could be some kind of cache or MetaMask? I don't see any errors or anything in the logs.

I have 8 nodes lol, does dshackle query all of them before returning the nonce after some amount of time?

```
Multistream | State of MATIC: height=19349893, status=LAGGING/4,OK/2,SYNCING/2, lag=[4, 4, 0, 92, 4, 1, 4, 32]
```