Quick answer: Unity TextMeshPro warning 'character limit exceeded' when setting long text async? TMP allocates buffer on first set; subsequent sets reuse - explicitly set Max Characters higher.
Long log printer assigns 4000-char text. TMP throws warning; truncates to 1024 chars.
Set Max Characters
Inspector or via SetText with character argument. Allocates buffer at expected max.
Or paginate
Show 1000 chars at a time; scroll for more. Easier to read; cheaper to render.
Use a different control
For long logs, consider UI Toolkit's ScrollView. Better for paged content.
“TMP allocates on first set. Defaults are conservative; long content needs explicit upgrade.”
If you display dev logs in TMP, the max-character setup is mandatory. Defaults will truncate critical info.