Cannot create Buy order with fractional (decimal) USDC amount , but editing existing order with same fraction succeeds

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Description

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What happened?

When attempting to place a new Buy order using a small fractional USDC amount (for example 0.00005 USDC), the UI throws a FormatException: Could not parse BigInt error and fails to create the order. Strangely, if an order is first created (with any valid amount) and then edited to use the same fractional USDC value, the update succeeds without error. In other words:

New order creation (using a tiny decimal amount) → Error (Could not parse BigInt) → order is not placed.

Editing an existing order (changing it to that same decimal amount) → Succeeds → order updates correctly.

Steps To Reproduce

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