bug#59902: 30.0.50; Image overlay is not updated until the cursor moves to the overlay

[Ihor Radchenko]

Eli Zaretskii <eliz@gnu.org> writes:

> Thanks.  I think when the image is replaced, you need to call
> clear-image-cache.

Sure, I can. Or even `image-flush'.
However, it is not obvious at all that it should be necessary to clear
image cache.

The current Emacs' behaviour is unexpected and very confusing here.
Ideally, Emacs should be able to judge by itself whether to update
cached image in memory.

-- 
Ihor Radchenko // yantar92,
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