totalGain = 0 in grafana for some strategies due to error

[kyhoon]

Some strategies seem to show totalGain = 0 in yearn.vision while their values from the multicall are actually bigger than zero.
The data team and I could find the two following examples, not sure how many of them we have.

ssc_dai_ib

ssc_dai_ib (0xa6D1C610B3000F143c18c75D84BaA0eC22681185)
in yvDAI 0.4.3 (0xda816459f1ab5631232fe5e97a05bbbb94970c95),
the totalGain drops to zero from around Jun 6th.

the above figure can be seen at https://yearn.vision/d/4YCbcel7k/vault-overview?orgId=1&var-networks=ETH&var-exp=false&var-vaults=yvDAI+0.4.3&from=1651359600000&to=1659308399000&viewPanel=14

but the above image shows that the totalGain was larger than zero at block 14917721, which was around the beginning of Jun 7th.

StrategyConvexMIM

StrategyConvexMIM (0x6570B0a1593a59CcB378fb0b01A753875FCa99c4)
in yvCurve-MIM 0.4.3 (0x2DfB14E32e2F8156ec15a2c21c3A6c053af52Be8)
again the totalGain drops to zero from around Jun 6th.

you can check out the above at https://yearn.vision/d/4YCbcel7k/vault-overview?orgId=1&var-networks=ETH&var-exp=false&var-vaults=yvCurve-MIM+0.4.3&from=1640995200000&to=1662073199000&viewPanel=14