Silent leak happens when adding a TextMeshPro GameObject in the Play Mode

How to reproduce:
1. Create a new Unity project
2. Enter the Play Mode
3. In the Hierarchy, right-click -> UI (Canvas) -> Button (TextMeshPro)
4. Resize the Scene/Game view window and observe the results

Expected results: The Editor is responsive
Actual results: The Editor stutters until the project is restarted

Reproducible with: 6000.3.12f1, 6000.4.2f1, 6000.5.0b2, 6000.6.0a3
Not reproducible with: 6000.0.71f1

Reproducible on: macOS Tahoe 26 (M1)
Not reproducible on: No other environment tested

Note:

• Out of many times, only once the log about the leak appeared in the Console, all other times no leaks were detected
• The bug is a regression and it is likely regressed in the early 6000.3 stream but the issue is inconsistent, so there is no exact regression point

Leak log:
Thread 0x3320af000 may have been prematurely finalized
Leak Detected : Persistent allocates 17 individual allocations. To find out more please enable 'Settings > Jobs > Leak Detection Level > Enabled With Stack Trace' and reproduce the leak again.