Uncaught TypeError: can't access property "useRef", z.current is null

[tatomir-streamflow]

Since migrating to Jup plugin (version 1.0.6 currently, but behaviour was observed in 1.0.4 as well) some users experience the widget disappearing and reappearing after refreshing.

Uncaught TypeError: can't access property "useRef", z.current is null
    React 2
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