Old ink, a worn out or partially clogged printhead (due to infrequent use) can all cause the problems you are describing. Have you performed a printhead alignment?
Also, a dirty timing (encoder) strip is something else you can look at.
Have you checked this:
Bay Area - CA
~R5 C (184.108.40.206) ~RF Trinity, ~RF 100~400, +Canon Control Ring~6D2 (v1.1.1) Retiring ~EF Trinity, others ~DxO PhotoLab Elite ~Windows10/11 Pro ~EVGA RTX 3080Ti FTW3 Ultra ~ImageClass MF644Cdw ~Pixel6 ~CarePaks Are Worth It