send with link for large numbers failing

[SustainabilityChain]

when sending a large amount with link (20'000 native) the following error appears:
Error: [number-to-bn] while converting number 2e+22 to BN.js instance, error: invalid number value. Value must be an integer, hex string , BN or BigNumber instance. Note, decimals are not supported

src/app.js:1684

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