Hmmm. Haven't seen this before.
https://www.jvt.me/posts/2020/08/16/globally-disable-tls-java-httpsurlconnection/ looks interesting.
The java client uses https://github.com/inversoft/restify/ under the covers, so maybe there's some setting in that library? The docs are sparse (some might say not there at all) but the code is reviewable.
Let us know what you find.