Execute in REPL hangs with larger Julia packages

Since upgrading to Julia 1.9 I've noticed that the Execute in REPL command (either by using the "run cell" button or one of the keyboard shortcuts) hangs indefinitely. I suspected it was compilation time, but whenever running a standalone .jl file, or a REPL initiated manually, this doesn't happen. This is confirmed by the fact that cells with more than a few lines that don't contain import statements hang too.

This MWE should reproduce the error:

---
title: "MWE"
---

```{julia}
using DifferentialEquations, Plots
# Rest of the cell never gets executed
```

I've noticed:

1. The task manager shows a Julia process that uses CPU resources constantly while the command is executing
2. The executeInREPL command provided by the Julia VScode extension doesn't seem to have this problem. i.e running the same code in the interactive REPL from a .jl file doesn't present the same problem
3. The prompt in the REPL changes. It doesn't say julia> anymore, it shows some number. For instance #87using DifferentialEquations

I'm running version v1.85.0 of the Quarto VSCode extension, version v1.38.2 of the julia VSCode extension, and running on MacOS

Start with the Quarto VSCode extension's Execute in REPL path and compare it with the Julia VSCode extension's executeInREPL command. Reproduce the supplied MWE and inspect the altered REPL prompt and continuously active Julia process; done means larger Julia cells, including imports, execute without hanging.