Why is SFDX deploy throwing a false warning/error regarding forceignore v2 and double asterisk wildcard? (**\.*)
An update to salesforcedx latest-rc made today should hopefully fix these issues. This will become the default core version shipped with the CLI release planned for this Thursday. You can try the fixes made in the latest-rc by:
sfdx plugins:install salesforcedx@latest-rc
https://github.com/forcedotcom/cli/issues/690#issuecomment-716869356
I no longer get the error or warning on salesforcedx 50.3.1
.