[jsroot] Scroll breaks on SWAN when using %rootbrowse

[aaronj0]

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Description

This bug was observed during the summer student course on SWAN. Leads to some underlying crash and the browser seems somewhat stuck, scroll does not work.
The browser was Microsoft Edge on a Windows machine.

Reproducer

In SWAN:

with ROOT.TFile("my_file.root", "RECREATE") as f:
    h = ROOT.TH1D("my_histo", "Example histogram", 100, -4, 4)
    f.WriteObject(h, h.GetName())

%rootbrowse my_file.root

ROOT version

6.40

Installation method

SWAN LCG_110

Operating system

Linux

Additional context

No response

[linev]

I cannot reproduce the problem.

I suspect, that %rootbrowse was called before file was correctly closed.
It is question of pyroot when it happens.