Image sizing is inconsistent

[tewha]

• Searched existing issues to avoid creating duplicates.

• Confirmed that it can be reproduced in built-in themes without customized css.

• Searched http://support.typora.io/

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Describe the bug
Images are inconsistently sized (and resized) as the document is scrolled.

To Reproduce
Steps to reproduce the behavior:

1. Insert two images near the top of the document as below.
2. Scroll the images off the screen and back on repeatedly.Expected behavior
   The images should consistently be at 33% size. instead, you'll see them first appear at 100%, sometimes (but not always) resizing to 33% after. Eventually, you'll get one at 33% and one at 100%.

<img src="./assets/tazzi-m.png" alt="tazzi-m" style="zoom: 33%;" /> <img src="./assets/tazzi-f.png" alt="tazzi-f" style="zoom: 33%;" />

Screenshots / Screencasts

Sample Markdown File
(I will send a ZIP file containing Markdown + Media after I have a bug number.)

Desktop (please complete the following information):

• OS: macOS 26.6.2 (25G83)

Typora Version
Typora 1.14.9 (7785)

[tewha]

Possibly related: Monitor is not HiDPI.