Incorrect coloring of columns using Tabulator's style.background_gradient after upgrading to version 1.3.1

[patwaibel]

ALL software version info

Python 3.10.13
Panel: 1.3.1
Pandas: 2.0.3
Bokeh: 3.3.0
Param: 2.0.0
MacOS 14.0

Description of expected behavior and the observed behavior

When using a Tabulator with the style.background_gradient method and the subset parameter, only the columns defined in the subset should be colored. However, currently with panel 1.3.1, all columns are being colored instead. The behavior was as expected when using panel version 1.3.0.

Complete, minimal, self-contained example code that reproduces the issue

import panel as pn
import pandas as pd
import numpy as np

df = pd.DataFrame(
    np.random.rand(20, 10) * 5.0,
    columns=list("ABCDEFGHIJ"),
)
tab = pn.widgets.Tabulator(
    df,
)
tab.style.background_gradient(
    cmap="RdYlGn_r",
    vmin=0,
    vmax=5,
    subset=df.columns.str.contains("A|C|I"),
)
pn.Row(tab).servable()

Stack traceback and/or browser JavaScript console output

Screenshots or screencasts of the bug in action

Panel 1.3.1

Panel 1.3.0

• I may be interested in making a pull request to address this