Image sequence is not updating correctly when .frameExtension is keyed

[yann19]

I am getting a weird issue with the use of image sequence in imagePlane nodes.

I import in a file eg. myPicture.0001.jpg (68 image files in total, with the last file being myPicture.00068.jpg) and in the imagePlane node, I perform the following options:

* Check `Use Image Sequence`

* Frame offset with a valuf of `-5`

Image sequence is playing correctly when I scrub the Time Slider from Frame 6 to 73. At Frame 5 or Frame 74, it seems to play one of the random frame within that sequence but I do not really care about it for now.

In the same imagePlane node, I made more changes to its options:

* I remove the expression in `Image Number` or aka `.frameExtension` attribute

* set a key at Frame 6 and `.frameExtension` with a value of 1

* set a key at Frame 73 and `.frameExtension` with a value of 68

* Change the in and out tangent curve of `.frameExtension` to use Linear

So as to hold the first and last frame of the image sequence..

However, when I tried to scrub from Frame 6 to 73 again, expecting the same result as before, I noticed that:

* At Frame 6, it is not using the first image of the sequence

* The first image of the sequence actually starts at Frame 11 for some reasons...

* And at Frame 68, instead of the image displaying myPicture.0068.png, it is displaying myPicture.0062.png...

Am I doing something wrong? Or if there is a command that I need to use to 'updates' the images in the imagePlane node?

P.S: I also tried using jpg extension, or changing the padding to myPicture.1.png, all seems to be giving me same results...