Error unmarshaling JSON: while decoding JSON: json: cannot unmarshal number into Go struct field ChartVersion.entries.appVersion of type string

Hello,
version.BuildInfo{Version:"v3.2.3", GitCommit:"8f832046e258e2cb800894579b1b3b50c2d83492", GitTreeState:"clean", GoVersion:"go1.13.12"}
Nexus OSS CE OSS 3.38.1-01

We have a problem with adding helm artifacts with appVersion as git short commit.
helm package --version 5.4.0 --app-version "57733e8" chart/

After pushing that we got problem with helm repo update or helm repo add
Hang tight while we grab the latest from your chart repositories…
…Unable to get an update from the “test1” chart repository (https://nexus.myhost.net/repository/test/):
error unmarshaling JSON: while decoding JSON: json: cannot unmarshal number into Go struct field ChartVersion.entries.appVersion of type string
Update Complete. ⎈Happy Helming!⎈

Can you clarify if its supported by Nexus and if yes, what is workaround?