linkage not working under Card

[jewfro-cuban]

ALL software version info

panel 0.10.1
bokeh 2.2.3
python 3.7.7
chrome Version 86.0.4240.111 (Official Build) (64-bit)

Description of expected behavior and the observed behavior

depth linkage not working under Card

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

This one works

import panel as pn
import requests
pn.extension()
depth = pn.widgets.IntInput(value=4)
obj = requests.get("http://dummy.restapiexample.com/api/v1/employees").content.decode('utf-8')
json = pn.pane.JSON(obj, depth=depth.value)
depth.link(json, value='depth')
pn.Column(depth, json, height=500)

and this doesn't

import panel as pn
import requests
pn.extension()
depth = pn.widgets.IntInput(value=4)
obj = requests.get("http://dummy.restapiexample.com/api/v1/employees").content.decode('utf-8')
json = pn.pane.JSON(obj, depth=depth.value)
depth.link(json, value='depth')
pn.Card(pn.Column(depth, json, height=500))

Stack traceback and/or browser JavaScript console output

[bokeh] document idle at 170 ms
VM63:305 [bokeh] document idle at 148 ms
default.js:1197 Kernel: starting (2142b625-5fb1-405a-a381-18209ac122c2)
default.js:1197 Kernel: restarting (2142b625-5fb1-405a-a381-18209ac122c2)
VM63:305 [bokeh] document idle at 308 ms

Screenshots or screencasts of the bug in action