I have experienced several different malfunctions with Kompozer in other operating systems, including Debian.
One type of malfunction which occurred more than once resulted in deleting part of the file, so I had to write it again. This wasted a lot of time.
The problem is probably with Kompozer, not the Tiny Core extension.
I don't use it any more.
I suggest using an alternative program.
I may just have been very unlucky. I don't know if others have had the same experience.