Purple stripe on last frame of .MP4?

[CrVMo]

Hi.
I have encoded a .mov file into a .MP4 file using Sorenson Squeeze.
Playing the file in SMPlayer: no problem
Playing the file in Adobe Premiere Pro CC: the last frame of the clip has a vertical purple stripe on the right hand side - see attachments.
Why has this happened?
How can I stop this happening to future encodes?
Many thanks for your help.
Regards,
CrVMo

[smrpix]

Premiere Pro uses that purple bar to indicate it is the end of the file (or sequence). This is normal. No, you can't turn it off. It has no effect on your actual file.

[CrVMo]

Premiere Pro uses that purple bar to indicate it is the end of the file (or sequence). This is normal. No, you can't turn it off. It has no effect on your actual file.

Many thanks for your answer. As you can tell, I'm still learning PPro!

All the best,

CrVMo