SUMMARY
***
When Title clip is created (with typewriter animation) added to timeline on first clip and later added to timeline in sequence 1, and then add to sequence 2 then start the pre-render. Then go back to sequence 1 make changes to title clip (in this case change font color). Then remove and pre-render it will load (some portion of old pre-render) shows previous font color.

Sometimes it gives error:
mlt_repository_init: failed to dlopen E:\Programs (Portable)\kdenlive-23.08.0_standalone\lib\mlt/libmltopencv.dll
  ("E:\Programs (Portable)\kdenlive-23.08.0_standalone\lib\mlt\libmltopencv.dll": The specified procedure could not be found.)
INVALID playlist: C:/Users/hp/AppData/Local/kdenlive/cache/1701789989391/preview/ba0d53b900895d64f05d0b03c8210d1e/preview.mlt 

Temporary fix was: Close and Reopen Project.
***

STEPS TO REPRODUCE
1. Create Title and add to timeline in sequence 1
2. Create sequence 2 and add sequence 1 to timeline
3. Pre-render some portion where Title is visible (in sequence 2)
4. Goto sequence 1 and update the Title (change font color)
5. Goto sequence 2 and again pre-render same portion.

OBSERVED RESULT
Mixes old render preview and new preview (with updated title)

EXPECTED RESULT
Shows updated preview render of updated title

SOFTWARE/OS VERSIONS
Windows:
Edition	Windows 10 Home Single Language
Version	22H2
Installed on	‎04/‎08/‎23
OS build	19045.3693
Experience	Windows Feature Experience Pack 1000.19053.1000.0
Processor	Intel(R) Core(TM) i3-8145U CPU @ 2.10GHz   2.30 GHz
Installed RAM	16.0 GB (15.9 GB usable)
System type	64-bit operating system, x64-based processor

KDE Frameworks Version: 5.111.0
Qt Version: Version 5.15.10 (built against 5.15.10)

ADDITIONAL INFORMATION