Liquidity pool staking dialog not calculating share asset amount

[grctest]

Describe the bug
When asset A and B are both 0, upon entering an asset A amount the asset B amount is calculated, but the associated pool share amount is not distplayed.

To Reproduce

Go to pool staking, have 0 in both a and b fields.

Enter 1 in asset A.

Asset B will be calculated, but the pool share asset amount won't be.

Expected behavior

Calculate the pool share amount properly.

Screenshots