repl: partially fix repl context

[BridgeAR]

This partially fixes contexts like {} instanceof Object === false
in the REPL. This does not fix all cases, since it's something
fundamental from the REPL's design that things like these can happen.

Refs: #27859

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• tests and/or benchmarks are included
• documentation is changed or added
• commit message follows commit guidelines