Hi
I also have this problem, and although I can see what is causing it I don’t know how to fix it.
I have a Canon TS8250, and the ink cartridge carriage will not move completely to the right. The reason is that the inky pad to its right doesn’t stay down - it is about 1-2 mm proud of where it should be and so gets in the way of the carriage. Maybe one or more of the small plastic lugs it is held in by are broken, in which case is it possible to get a replacement for this part? Or is there a way to get it to stay down without getting a replacement? Also if anyone knows the proper name for this inky pad I would love to know what it is! Thank you.