Desktop: simple insertion of one character could erase a whole inline math expression at another position

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Duplicate of

Math formula unexpectedly deleted

Steps to Reproduce Copy and paste the following: $x$ Paste $x$ text into the first line so that it becomes: $x$ text $x$ Note: Don’t move the cursor inside the formula to expand it. Type anything on the first line. The $x$ you just pasted gets unexpectedly deleted. [2025-10-17 01-01-14 1.13.16 AM] Description This issue occurs with any formula (inline or block) $x$ or even $$x$$. If you paste $x$text (where text can be anything) before the last $x$ — without moving the cursor …