Frame card's content flickering even if not changed

[Far0n]

Wave SDK Version, OS

wave 0.22.0

Actual behavior

The content of the frame_card is flickering even if the card is not touched during a serve invokation:

firefox_RFH0Jqn7gn.mp4

Expected behavior

Contents of unchanged cards wont flicker.

Steps To Reproduce

• Run the following app and press "click me" several times:
• Tested in Firefox and Chrome

from h2o_wave import main, app, Q, ui

import plotly.graph_objects as go
fig = go.Figure(
    data=[go.Bar(y=[2, 1, 3])],
    layout_title_text="A Figure Displayed with fig.show()"
)
html = fig.to_html()


@app('/demo')
async def serve(q: Q):
    if not q.client.initialized:
        q.page['form1'] = ui.frame_card(box="1 1 -1 6", title="FrameCard", content=html)
        q.page['form2'] = ui.form_card(box="1 7 -1 1", items=[ui.button(name="btn", label="click me")])
        q.client.initialized = True
    else:
        # thw following is enough to make "form1" flicker on button click
        q.page['blub'] = ui.form_card(box="", items=[])

    await q.page.save()