Sometimes when successfully opening a thermogram, the render only redraws the old thermogram in a different color schem

[Arthur Nieuwland]

• One thermogram is already opened
• Another is opened on request
• Instead of drawing the new thermogram, the old thermogram is redrawn but in a different temperature scale
• The cause is unclear

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[Arthur Nieuwland]

Seems to consistently happen when opening the flir_e4_1.jpg